yj 4 Cornell University Library Dthaca, Nem York eS — bean ALBERT R. MANN LIBRARY NEw York STATE COLLEGES OF AGRICULTURE AND HoME ECONOMICS AT CORNELL UNIVERSITY rnefl Univer 4C63D tected during i Ci ive Library QK 569.D5 Diatoms, c ee: iii 3 1924 000 645 840 xpedition mann ii ae SP iRewdlh— S10 Sek Vale "aAW& we poe plole {1 QehmomlfQr anowlawdice, QL. 60+ 35° Y Hoenn alko., hip SOT RSS So: cet rey Car =35 =72 o£ —— 4.77 -35 -// Gam piora, Lobrd See 1.05 35 - / Gl foden Peseta on. fis $02 -38 -78 hlawnecool Hh. 518 238 76 i Dinnbotius von muta 5/3 -38 - o groscanlun fob asnaoig Qo. 503 -38- 0CConamanekican, OL LGO <35 p. Epacimodiacinro ee Radon 8 1489 - 388 -8/ »— CRaudhiiciron 503 -38-82 ee scone elas 507 - 37-58 Aol?) 2 yl dius. Gr. —L4 84 -37- 64 Whale ne acute, hum. 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Di dence ipo Ls the Dan ody 20. 6-35-13 FRopRensinQunebiacaney Ra nbo- 37 32 recta, ht 499-87 ae eee Gun $ =3 Mutat, & inti 223 ee won) Nous) TPs quarter a dhatatco, Bont. 46. 3 4s Man ap ede c € 507 - 37 = 7 i Mluadea, ae te - /0 ti Titans. Sis ete = 79 Jr achyop Renta ne lan Non. ahi pkica, Q. } 500 - 34 Sey = Orelih = 89h. DIATOMS, ee COLLECTED DURING THE EXPEDITION OF THE VEGA EXAMINED BY P, T. CLEVE. (COMMUNICATED 1883, MARCH 27.) WITH FOUR PLATES. Fo OK 5OF ° DS CL3D N\ SS6S30 During the expedition of the Vega Mr. Kjellman collected a number of samples containing diatoms, which with the per- mission of Prof. Nordenskiéld were delivered to me for exami- nation. The gatherings were the following: 1. Five bottles with diatoms collected on the ice near Cape Wankarema. 2. Diatoms washed from alge, collected near Pitlekaj, Cape Desclinew (East Cape). 3. Surface diatoms from the Behring Sea. 4, Fresh-water diatoms from Japan. 5. Diatoms from alge collected on the Island of Labuan near Borneo. 6. Diatoms washed from alge collected near Point de Galle, Ceylon, and coarse bottom-mud, dredged in the same locality. _ 7. Mud from the bottom between Aden and Bab-el-Mandeb. Besides there were taken several samples of mud from the bottom of the North Siberian sea, which all proved free from diatoms. For the examination of several of these samples, sufficiently clean slides could not be prepared by the usual cleaning pro- cess, so that the specimens must be selected and mounted. In this difficult work I had the good fortune to be helped by the german microscopist Mr. Weissflog, who prepared for me, with the most exquisite skill, slides containing diatoms. from Labuan, Ceylon and Bab-el-Mandeb. For this consider- able assistance, without which I should hardly have found so many species, I render him my best thanks. I. Diatoms of the Arctic Sea. The first notices about the diatoms of the Arctic Sea have been given in 1841 by Ehrenberg, who examined some 458 CLEVE, DIATOMS. samples from Spitsbergen and later, in 1853, some from Assist- ance Bay (73°50' N. lat.)1. The limited number of arctic species found by Ehrenberg was considerably increased by O’Meara2, who published, in 1860, a list of diatoms, gather- ed during the arctic expedition of the »Fox» under the com- mand of Sir Leop. M’.Clintock. O’Meara enumerates not less than 85 species, among which several are fresh-water inhabitants and some doubtful, the limits of the species being at that time in many cases others than admitted at present. The Swedish expedition to Spitsbergen, in 1861, under the direction of Torell, procured some material containing marine diatoms, which were examined by myself? Later I obtained better materials, especially many very rich and interesting gatherings from the surface of the northern Atlantic and Davis Strait, collected during the Swedish expedition under Norden- skidld to Greenland in 1870. The result of the examination of these materials, as well as many others from Spitsbergen, obtained from the Riksmuseum of Stockholm, was published in 18734. Afterwards Mr. O’Meara published a catalogue of species ® collected by Mr. Eaton on the voyage of Mr. Leigh- Smith. Mr. O’Meara found several new species, which, however, have been figured in such a manner, that the identification may be impossible without original specimens for comparison. During the Swedish expedition in 1875 and 1876 to the Kara Sea and to Yenisei M. M. Kjellman, Lundstrém and Stuxberg collected several samples containing diatoms, which were of the greatest interest for the knowledge of the diatoms in the Arctic Sea, east of Spitsbergen. Also has Mr. Kjellman, during his exploration of the alge of the coasts of Finmarken, collected most rich and interesting materials, containing diatoms from the northern part of Norway. All these materials were examined by Mr. Grunow and myself ®. During the expedition of the Vega Mr. Kjellman collected extremely rich and important materials on the ice-flakes near Cape Wankarema. The species contained in these samples were numerous and in a most astonishing or almost incredible a man- ner variable, so that it was in many cases scarcely possible 1 Monatsber. der Berl. Akad. 1841, page 206 and 18538, page 522. ? Journ. Roy. Dublin Soc. 1860 July. * Ofvers. K. Sy. Vet. Akad. Férh. 1867, page 661. 4 Bihang till K. Sv. Vet. Akad. Handlingar, Vol. I, N:o 18. 5 Micr. Journ., Vol. XIV (NS) pag. 253. 6 K. Sv. Vet. Akad. Handl. Vol. XVII, N:o 2, 1880. VEGA-EXPEDITIONENS VETENSKAPLIGA ARBETEN. 459 to trace out the limits of the species. Also were rich, but less interesting materials obtained from alge, collected near Cape Deschnew. Several samples of the bottom-mud from the North Siberian Sea were also taken, but in examining them I could not find a trace of diatoms. All the materials from the expe- dition of the Vega have been examined by myself. Still more materials from the hyperboreal America were collected during the British expedition under the command of Sir George Nares and examined by Mr. G. Dickie?!. Afterwards I have received, through the kindness of Prof. Oliver, some of these samples. Among them only three were rich enough to be subjected to the usual cleaning-process, viz. from Bessel’s Bay, 81°7' N, Mushroom Point, 82°28' N, and Discovery Bay, 81° 41’. ' The result of my examination of these gatherings are to be found in the following pages. Also from the distant Franz Joseph Land some diatomaceous gatherings have been col- lected on the ice-flakes during the Austrian expedition under Weyprecht. Some of the species found by Mr. Grunow in these materials have been published in Van Heurck’s Synop- sis and issued in Cl. and Méller Diat. No 314. Mr. Grunow will later publish in a more complete manner his researches in regard to these most interesting diatoms. The materials brought together from the Arctic Sea are thus very considerable, and their examination may give a tolerably complete idea of the diatomaceous vegetation the Arctic Sea. I have therefore tried to give in the following pages a complete list of all the arctic species, found by myself and by Mr. Grunow, omitting those found by other authors, not beeing sure about their determinations. Index of marine arctic Diatoms. A. Placochromatice. {. Cocconeide. Cocconeis Scutellum Ehb. (Van Heurck Syn. XXIX, 1—12) Greenl., Mushroom Point, Fr. J. L.2, Spitsb., Finm., Kara, Cape Deschnew (East Cape). 1 Jour. Linn. Soc. Vol. XVII, page 6. * F, J. L. Franz Joseph Land according to Grunow. 460 CLEVE, DIATOMS. var. stauroneiformis, Spitsb., Finm., Mushr. P., Cape Desch- new (East Cape). forma parva, — Cape Deschnew (East Cape). f. minutissima Grun. — F. J. L. C. distans Greg. (D. of Cl. Pl. IX, fig. 23, A. Schm. N. Sea Diat. III, fig. 22—23) Mushroom Point, Kara. _ C, pseudomarginata Greg. (D. of Cl. Pl. IX, fig. 27, C. pellu- cida Grun. Verh 1863 Clev. D. of the A. 8. pag. 14) Greenl., Spitsb., Finm., Kara. C. dirupta Greg. (Van Heurck Syn. Pi. XXIX, fig. 13—14) Greenl. ‘ C. decipiens Cl. (D. of the A. 8. pag. 14, Pl. I, fig. 6, lower valve, Pl. Il, fig. 11 a, upper valve) strize on the upper valve 19 in 0,01 mm. — Greenl., Bessel’s Bay, Finm. C. arctica Cl. (D. of the A. S. pag. 14, Pl. II, fig. 11 b., upper valve). Length 0,03 mm. Br. 0,018 mm. Lower valve with sig- moid median line and coarse strie, composed of distinct puncta, 12 in 0,01 mm. Central nodule, surrounded by a small area. Upper valve without distinct median line and central nodule. Striee interrupted, marginal and axial 11 in 0,01 mm. Pl. 35, fig. 4 a, lower, 6, upper valve. Greenl., Bessel’s Bay, Finm. C. costata Greg. (Van Heurck Syn. Pl. XXX, fig. 11—12) Greenl., Mushroom Point, Spitsb., Finm. C. finmarchica Grun. (Arct. Diat. p. 16 Pl. I, fig. 1) Bes- sel’s Bay, Finm. C. quarnerensis (Grun.) A. Schm. (N. Sea Diat. Pl. III, fig. 15—16) Greenl., Spitsb., Finm. 2. Mastogloiacee. Mastogloia ovata Grun. (A. Diat. Pl. I, fig. 2) Finm., Kara. M. kariana Grun. (A. Diat. pag. 17, Pl. I, fig. 3) Kara. 3. Achnanthea. Achnanthes subsessilis Kitz. (Achnanthidium arcticum Cl. D. of the A. S. p. 25, Pl. IV, fig. 22, A. brevipes Ag.) Greenl., Mushroom Point, Spitsb., Finm. A. coarctata (Bréb) Grun. Mushroom Point. A. grénlandica (Cl.) Grun. (Achnanthid. Cl. D. of the Arct. Sea, pag. 25, Pl. IV, fig. 23) Greenl., Bessel’s Bay (common), Spitsb., Finmark. VEG A-EXPEDITIONENS VETENSKAPLIGA ARBETEN. 461 The fig. previously published by myself is taken from balsam-mounted specimens and not sufficiently exact, for which reason I have drawn a new sketch of the upper and lower valves Pl. 35, fig. 3 a, lower valve, 6, upper valve. A, (hungarica Grun. var.?) jamalinensis Grun. (A. Diat. pag. 20, Pl. I, fig. 4) Kara. A. (?) teniata Grun. (Arct. Diat. p. 22, Pl. I, fig. 5) Kara. var.? hyperborea Grun. F. J. L. A, delicatula (Kg.) Grun. (Van Heurck Syn. Pl. XXVII, fig. 3—4) Greenl., Bessel’s Bay. 4. Amphoree. Amphora levis Greg. (Grun. Arct. Diat. pag. 24, Pl. I, fig. 8) Kara. A. levissima Greg. (D. of Cl. pag. 513, Pl. XII, fig. 72) Kara, Finm. A. ostrearia Bréb. (A. Schm. Atl. Pl. XXVI, fig. 23) Finm. var. nova caledonica Grun.? (A. Schm. Atl. Pl. XXVI, fig. 24) Davis Strait. z var. vitrea Cl. (Ofvers. af K. Sv. V. Ak. Férh. 1868, pag. 237, Pl. IV, fig. 5—6) Spitsb. — Length 0,085 mm. Br. 0,068 mm. Striz, composed of distinct puncta, 9 in 0,01 mm., on the con- nect. membrane 11 in 0,01 mm. A. ocellata Donk. var. jamalinensis Cl. & Grun. (A. Diat. pag. 24, Pl. I, fig. 6) Kara. A. Weissflog A. Schm. (Atl. Pl. 25, fig. 59) Davis Strait. Length 0,06 mm. Strise costate, 10 in 0,01 mm. A. acuta Greg. (D. of Clyde, pag. 524, Pl. XIV, fig. 93 and 93 b.) Greenl., Spitsb., Finm. A. hyalina Kiitz. (A. Schm. Atl. Pl. XXVI, fig. 52—55) Spitsb. A. lineolata Ehb. Kara (sec. Grun.) Small form with 20— 21 strie in 0,01 mm. A. lineata Greg. (A. Schm. Atl Pl. XXVI, fig. 59, 4. granu- lata Greg.?) Greenl., Bessel’s Bay, Spitsb., Finm.,, Kara. A. tenera W. Sm. (Syn. I, pag. 20, Pl. XXX, fig. 252)? Finm. A. coffeeformis Kiitz. (A. 8. Atl. Pl. XXVI, fig. 56-—58) Kara. A. lanceolata Cl. (Ofvers. K. Sv. Vet. Ak. Forh. 1867, pag. 667, Pl. XXIII, fig. 2) Greenl., Finm., Spitsb., Kara. Valve acute, median line straight, striz costate, parallel in the exterior, more or less radiant in the interior part of the valve not reaching the median line. Strie in typical speci- 462 CLEVE, DIATOMS. mens 8 in 0,01 mm., but vary more dense. In a small speci- men var. minor Cl. from Pitlekaj Cape Deschnew (East Cape) I counted 14 striz in 0,01 mm. A. angusta Greg. var. arctica Grun. (A. Diat. pag. 24, Pl. I, fig. 29) Spitsb., Kara. A. Proteus Greg. (Diat. of Cl. pag. 518, Pl. XIII, fig. 81) Greenl., Bessel’s Bay, Mushroom Point, Spitsb., Finm., Kara. var. kariana Grun. (A. Diat. pag. 24, Pl. I, fig. 7) Kara, Cape Deschnew (East Cape), Greenland. A. robusta Greg. (D. of Cl. pag. 516, Pl. XIII, fig. 79) Spitsb. var.? A. Schm. Atl. Pl. XXVII, fig. 44 — Greenl., Spitsb., Cape Deschnew (East Cape). A. Erebi Ebb. (A. cymbifera Greg. Diat. of Cl. pag. 526, Pl. XIV, fig. 97, A. Schm. Atl Pl. XXV, fig. 17; 18, 19, 33, 36, Pl. XXVI, fig. 33, A. Leighsmithiana O’M.?) Strie costate. — Greenl. Mushroom Point, Spitsb., Finm., Kara, Cape Deschnew (East Cape). A, cymbifera (Greg.?) Cl. (A. Schm. Atl. Pl. XXV, fig. 35) Strie composed of distinct puncta. — Greenl., Spitsb. One specimen from Green]. measures in length 0,12 mm. and has 7 strie in 0,01 mm. A. spectabilis (Greg.?) A. Schm. (Atl. Pl. XL, fig. 20—23. A. furcata Leuduger Fortmorel) Davis Strait. A. Grevilleana Greg. Finm. A. fasciata Greg. (Tr. M. 8. V. Pl. I, fig. 36, D. of Cl. Pl. XIII, fig. 91) Finm. A. compleza Greg. (D. of Cl. fig. 90) Spitsb., Brandewijne Bay. — Strie composed of distinct puncta 12/2 in 0,01 mm. on the valve, 17 in 0,01 mm. on the connecting membrane. A. Arcus Greg. (T. M. Soc. V. pag. 75, Pl. I, fig. 37) Spits- bergen, Hinlopen Strait. A. Eunotia Cl. (D. of the A. S. pag. 21, Pl. ITI, fig. 17) Greenl., Finm., Spitsb., Kara. Specimens from Spitsbergen have 71/s strie in 0,01 mm. on the valye and 11 in the connecting membrane. A. crassa Greg. (D. of Cl. pag. 524; Pl. XIV, fig. 94) Greenl., Spitsb., Finm., Kara, Cape Deschnew (East Cape). A. subinflata Grun. (A. §. Atl. Pl. XXVI, fig. 49) Finm. A. plicata Greg. (T. M. 8. V. pag. 70, Pl. I, fig. 31) Spitsb- A. (baltica Grun. var.?) arctica Grun. (Cl. & M. Diat. No 172) Davis Strait. Not known to me. VEGA-EXPEDITIONENS VETENSKAPLIGA ARBETEN. 463 5. Gomphonemez. Rhoicosphenia curvata (Kitz) Grun. (Gomphonema curvata and G. marina W. Sm. Syn. 1, Pl. XXIX, fig. 245—246) Greenl., Bessel’s Bay, Spitsb., Finm., Cape Deschnew (Hast Cape). Gomphonema kamtschaticum Grun. (Casp. S. Alg. pag. 12, Pl. ITI, fig. 4. Van Heurck Syn. Pl. XXV, fig. 29) Greenl., Bes- sel's Bay (a small form, length 0,03 mm. br. 0,005 mm. Strie 15 in 0,01 mm. in the middle 18 in the end.) Mushroom Point. Cape Wankarema (var. siberica Grun. in Cl. M. Diat. 315—318, more slender and linear; striz less radiant.) G. pachycladum Bréb. (Van Heurck Syn. Pl. XXV, fig. 31— 32) Cape Wankarema. Striz parallel, 16 in 0,01 mm. Length 0,027 mum. Br. 0,006 mm. G. arcicum Grun. (Van Heurck Syn. Pl. XXV, fig. 30) F. J. L., Novaya Zemlya (on the ice), Cape Wankarema. 6. Naviculacez. Navicula Bory. Sectio: Pinnularia. Nawicula Pinnularia Cl. (Ofvers. af K. Sy. Vet. Ak. Forh. 1868, pag. 224, Pl. IV, fig. 1-2. WN. quadratarea A. S. N. Sea Diat. Pl. II, fig. 26) Greenl., Mushroom Point, Spitsb., Finm., Kara, Cape Wankarema. In the Cape Wankarema material occur a number of va- rieties. The valve vaiies from subconstricted to gibbous in the middle with all possible transitions to N. Stuaxbergii Cl. The strie are in some specimens from the same locality inter- rupted and vary from 9 to 12 in 0,01 mm. var. interrupta Cl. Pl. 36, fig. 21. Another variety, asymmetrica Cl., has the striz on one half of the valve more approximate to the median line, than on the other. Length 0,08. Br. Oot strie- 8 in 0,01 mm. obscurely punctate. N. Stuaxbergu Cl. (A. Diat. pag. 13, Pl. I, fig. 15) F. J. L., Kara, Cape Wankarema. var, subcontinua Grun. F. J. L. (unknown to me). var. leptostauron Grun. F. J. L. (unknown to me), N. fluminensis Grun. (Verh. 1860 pag. 520, Pl. I, fig. 7) Kara. 464 CLEVE, DIATOMS. var. minor Grun. (A. Diat. pag. 28, Pl. I, fig. 12) Finm. N. cruciformis Donk. (Brit. Diat. Pl. X, fig. 4) Finm. var. brevior Cl. — Length 0,035 mm. Br. 0,009 mm. Str. 14 in 0,01 mm. Cape Deschnew (East Cape). — Pl. 35, fig. 18. * Théelii Cl. (A. Diat. pag. 13, Pl. I, fig. 22) Kara, Cape Deschnew (East Cape). Specimens from Cape Deschnew (East Cape) have the length 0,05 mm. and the br. 0,018 mm. Strize 12 in 0,01 mm. In the Cape Deschnew (East Cape) material occur some specimens, which seem to connect N. Théelii with N. Pinnularia. NV. decurrens (Ehb.) Grun. In the Cape Deschnew (East Cape) gathering occurs a Navicula, which Grunow refers to N. decur- rens. It has about 11 costate and radiant strie in 0,01 mm., which do not reach the median line. Length 0,06 mm. Breadth 0,013 mm. The valve is linear with gibbous middle and rounded obtuse ends. Median line is slightly undulating. In some specimens the strie are absent in the middle of the valve, in which case the form seems to be closely allied with Nav. cru- ciformis although the latter has the strie reaching to the me- dian line. On the other side it seems also akin to Nav. bica- pitata Ldt. — Pl. 36, fig. 20. ; NV. globiceps var. crassior Grun. (A. Diat. pag. 27, Pl. I, fig. 18) Kara (fresh-water species?). N. megastauros Cl. — Small, elliptic, probably depressed in the middle. Strie costate, oblique, reaching the median line, except in the middle, where they are very short or marginal, so that the central nodule is surrounded by a large stauros. Strie 16 in Q,o1 mm. Length 0,02 mm. Breadth 0,008 mm. Cape Deschnew (East Cape). — Pl. 386fig. 19. Sectio: Limose. N. ventricosa (Ehb.?) Donk var. subundulata Grun. (A. Diat. pag. 29, Pl. I, fig. 16) Kara. . var. Kjellmaniana Cl. (A. Diat. pag. 29,. Pl. I, fig. 17) Finm. N. subventricosa Grun. (A. Diat. pag. 29, Pl. I, fig. 19) Kara. N. liber W. Sm. (A. S. Ath Pl. L, fig. 16—18) Greenl., Spitsb., Finm. var. elongata Grun. (N. elongata Grun. A. 8S. Atl. Pl. L, fig. 27—29). N. Scopulorwm Bréb. — Cape Deschnew (East Cape); a large spe- cimen, 0,17 mm. in length, 0,01 mm. in breadth; striz 23 in 0,01 mm. Sectio: Quadriseriate. N. subdivisa Grun. (A. Diat. pag. 29, Pl. I, fig. 20) Greenl., Mushroom Point, Kara, Cape Deschnew (Hast Cape). VEGA-EXPEDITIONENS VETENSKAPLIGA ARBETEN. , 465 A specimen from Cape Deschnew (East Cape) has 21 strie in 0,01 mm. in the middle and 23 near the ends. Lenght 0,035 rom. Br. 0,005 mm. N. latefasciata Grun. (A. Diat. Pl. I, fig. 21) Greenl., Mush- room Point, Kara, Cape Deschnew. (Hast Cape). Specimens from Cape Deschnew (East Cape) have not so strongly interrupted strie as specimens from Kara. N. grénlandica Cl. (K. Sv. Vet. Ak. Handl. 18 No 5, pag. 7, Pl. I, fig. 18) Davis strait. Sectio: Palpebrales. N. palpebralis Bréb. var. Davis Strait. — Length 0,045 mm. Breadth 0,013 mm. Strie 10 in 0,01 mm. costate, scarcely punctate. var. minor Grun. (A. Diat. pag. 30, Pl. I, fig, 23) Finm. A variety from Spitsbergen has 16 strie in 0,01 mm. Length 0,04 mm. Breadth 0,008 mm. WN. minor Greg. N. semiplena (Grev.) Donk (Brit. Diat. Pl. IV, fig. 5) Finm., Spitsb. (Length 0,065 mm. Breadth 0,001 mm. Striz 10 in 0,01 mm.). N. solida Cl. (A. Diat. pag. 13, Pl. I, fig. 24) Finm. Sectio: Amphisbene. N. brevis Greg. (Diat. of Cl. pag. 478, Pl. IX, fig. 4, A. Schm. N. Sea Diat. Pl. II, fig. 15) Greenl., Davis Strait, Finm., Spitsb., Cape Deschnew (East Cape). var. verans Grun. (A. Schm. N. Sea Diat. Pl. I, fig. 14) Finm., Matotschkin, Kara. var. distoma Grun. (A. Diat. pag. 30, Pl. I fig. 25—26) Finm. N. amphisbena var. fuscata (Schum) Grun. (A. Diat. pag. 31, Pl. I, fig. 27) Kara. ‘N. subsalina Donk. (Brit. Diat. Pl. IV, fig. 2, N. Fenzlit Grun. N. lacustris Grun.) Greenl., Spitsb., Finm. Sectio: Radiose. N. flanatica Grun. has been indicated in Cl. Diat. of the A. 8. pag. 17 as an arctic species. I have, however, not found this species in reexamining my old slides, so there may be a mistake in the determination. N. Gastrum (Ehb.?) Donk. (Van Heurck Syn. PI. VIII, fig. 25 and 27) Kara, Cape Deschnew (East Cape) (Fresh-water species ?). var. jenisejensis Grun. (A. Diat. pag. 31, Pl. I, fig. 28) Cape Deschnew (East Cape). N. digito-radiata Greg. (A. Schm. N. Sea Diat. Pl. III, fig. 4) Greenl., Mushroom Point, Finm., Spitsb., Kara. Bd Il. 30 466 CLEVE, DIATOMS. N. peregrina (Ehb. 2) Kiitz. (Van Heurck Pl. VII, fig. 2, A. Schm. Atl. Pl]. XLVII, fig. 57—60) Green! Mushroom Point, Kara, Cape Wankarema. var.? polaris Ldt. (Bih. t. K. Sv. Vet. Ak. Handl. I, No 14, pag. 26, Pl. II, fig. 3) Kara.. N. valida Ol. at°Grun. (A. Diat. pag. 32, Pl. I, fig. 29) Kara, Cape Wankarema. In the latter locality N. valida occurs in a great profusion of varieties, which are all asymmetric, the strie on one half of the valve being more approximate to the median line than on the other. The striz are always distinctly transversely lineate. One variety minuta Cl. has not alternately longer and shorter strie in the middle. Strie 8 in 0,01 mm. Length of the valve 0,025 mm. Br. 0,013 mm. Typical specimens have the length 0,03 mm., the breadth 0,023 mm: and 8 strie, which in the middle are alter- nately longer and shorter. One variety is 0,11 mm. in length and 0,026 mm. in breadth, has 8 strie in 0,01 mm., scarcely alter- nately longer and shorter in the middle, and is very asymme- tric. It comes near to N. distans var. borealis Grun, but has more dense strie. It approaches also fig. 17 and 18 in A. Schm. Atl. Pl. XLVI, which, however, are not distinctly asymmetric. N. imperfecta Cl. — Broadly oval, 0,065 mm. in length and 0,08 mm. in breadth. Strie coarse, minutely transversely lineate, on one half of the valve more approximate to the med. line than on the other, shortened around the central nodule, 8 in 0,01 mm., interrupted. — Pl. 36, fig. 34. — Kara, Cape Wankarema. This form comes near to N. valida, but différs in its striee, which are much less distinctly transversely lineate and many times interrupted, so that they seem to be composed offragments. N. Placentula var. lanceolata Grun. (A. Diat. pag. 34) Kara. N. salinarum Grun. (A. Diat. pag. 33, Pl. II, fig. 34) Spitsb., Kara. N. rhynehocephala Kiitz (Grun. A. Diat. pag. 33) Kara, Cape Deschnew (East Cape). N, botinica Grun. (A. Diat. pag. 32, Pl. II, fig. 32) Finm. Sectio: Directe. N. directa W.Sm. In the gatherings collected by Mr. Kjell- man on the ice of Cape Wankarema occurs an almost incred- ible profusion of varieties and forms, all connected with each other and more or less akin to N. directa. Many of these forms are very different to the outline, number of stria, which are entire or more or less interrupted, always distinctly transversely lineate. Many of these forms are distinctly asym- VEG A-EXPEDITIONENS VETENSKAPLIGA ARBETEN. 467 metric, others not. There are also closely allied forms, which have arcuate valves and therfore belong to Rhotkoneis. The Rh. Bolleana Grun. is really nearly allied to the group of Nav. directa. Although all the forms of this section in my opinon are nearly allied, it may be necessery to name them and arrange them. To N. directa I refer all slender, or almost linear forms, about 10 times longer than broad, which have parallel stric, shortened around the central nodule. var. remota Grun. (A. Schm. Atl. Pl. XLVII, fig. 2) strie 4 —5 in 0,01. mm. — Finm., Spitsb., Kara (Matotschkin Schar). var. Incus Grun. (A. Schm. Atl. Pl. XLVII, fig. 7 from the Mediterranean Sea) Strie 4 in 0,01 mm. very slightly radiant, on one half of the valve interrupted. I have not seen typical specimens from the Arctic Sea. var. angusta Grun. (A. Diat. pag. 39) strie 8 in 0,01 mm. Greenl. (Mushroom Point), Finm., Spitsb., Kara, Cape Deschnew (East Cape). Seems to me to be the typical N. directa W. Sm. var. subtilis Greg. (Pinnul.? subt. Greg. D. of Cl. pag. 488, Pl. IX, fig. 19) striee 9—11 in 0,01 mm. Spitsb., F. J. L., Cape Deschnew (East Cape), Cape Wankarema. var.? decussatim-striata Grun. — F. J. L. (unknown to me). N. transitans Cl. — Intermediate forms between N. directa and N. Zostereti Grun. Valves more or less abbreviate, lan- ceolate. Strise parallel or slightly radiant. forma genwina. — 6 to 4 times longer than broad, lanceolate. Strie coarsely lineate, 8 in 0,01 mm. almost parallel, shortened around the central nodule. Length 0,065 to 0,09 mm. Breadth 0,016 mm. to 0,02 mm. — Cape Wankarema. — Pl. 36, fig. 31 and 33. var. derasa Grun. (Nav. derasa Grun. A. Diat. pag. 39, Pl. Il, fig. 46). Strize on both sides of the median line inter- rupted by a linear area, 81/.—12 in 0,01 mm. in the middle, “ 10—14 near the ends, not so strongly transversely lineate as in typical specimens, (according to Grunow the strie are 10 in 0,01 mm. in the middle and 16 at the ends). Length 0,067 mm. Breadth 0,015 mm. — Kara, Cape Wankarema, Cape Deschnew (East Cape). forma minuta. — Strie 12 in 0,01 mm., distinctly trans- versely lineate. Length 0,035 mm. Breadth 0,012 mm. — Cape Deschnew (East Cape). Pl. 36, fig. 37. form. gracilenta Grun. I. c. Kara. N. incudiformis Grun. (N. Incus abbreviata Grun. A. Diat. 468 CLEVE, DIATOMS. pag. 39, Pl. II, fig. 43) Striee 8 in 0,01 mm. on one half of the valve more approximate to the median line than on the other, and on this half interrupted. Length 0,0095—0,05 mm. Valves sometimes. arcuate. Cape Wankarema. Pl. 36, fig. 26, 30. This variety seems to connect Nav. (Rhoikoneis) superba Cl. with N. transitans. N. Zostereti Grun. — More or less lanceolate. Strize slightly radiant, distinctly tranversely lineate; strie 5 to 12 in 0,01 mm., more approximate at the ends. ‘ forma genuina (A. Schm. Atl. Pl. XLVI, fig. 42—44 with about 7 striz in 0,01 mm.). Specimens from Kara have 9 strize in 001 mm. Length 0,1 mm. Breadth 0,02 mm. var. acutiuscula Greg. (Pinn. acutiuscula Greg. T. M. Soc. IV, pag. 48, Pl. V, fig. 21) Strie about 11 in 0,01 mm. — Kara. (Length 0,06 mm. Br. 0,01 mm.) Nay. longa Greg. (1. c. fig. 18) with 5 str. in 0,01, may per- haps be regarded as a form of N. Zostereti, were not the median line described as generally twisted, which character seems to indicate that N. longa is a Scoldopleura. N. erosa Cl. — More or less elliptic, about 5 times longer than broad, tapering regularly from the middle to the ends. Striee coarse, 71/.—10 in 0,01 mm., transversely finely lineate, a little radiant, interrupted, so that they have the appearance of being composed of fragments. Central nodule surrounded by a small area. Length 0,1 mm. Breadth 0,02 mm. — Pl. 36, fig. 28. — Cape Wankarema. N. (Rhoikoneis) ¢rigonocephala Cl. N. Sp. — Linear with pa- rallel sides and cuneate, sometimes protracted ends. Valves often arcuate. Strie coarse 10—12 in 0,01 mm., almost paral- lel, interrupted as in N. erosa, transversely lineate. Length 0,05—0,065 mm. Breadth 0,01—0,012 mm. — PI. 36, fig. 29.’ — Cape Wankarema. N. asymmetrica Cl. N. Sp. — Elongated elliptic, 4—5 times longer than broad. Strie almost parallel, interrupted, 93/2 in 0,01 mm., transversely lineate, on one half of the valve reaching the median line, on the other ending at some distance from it. Length 0,1 mm. Breadth 0,023 mm. — PI. 36, fig. 27. — Cape Wankarema. Perhaps an asymmetric variety af N. erosa. N. (Rhotkoneis) superba Cl. Valves rhombic, arcuate (or sometimes straight), convex and concave valves being more or less different. Strice almost parallel, transversely lineate, on the ’ VEGA-EXPEDITIONENS VETENSKAPLIGA ARBETEN, 469 convex valve 9 in the middle, 10 in 0,01 mm. toward the ends, reaching almost to the median line; on the concave valve 8— 10, on one side of the valve not reaching the median line, on the other reaching the median line, but interrupted by a linear area. Length 0,06 mm. Breadth 0,02 mm. — PI. 36, fig. 23. Cape Wankarema. var. elliptica Cl. Valve elliptic. Strize parallel, 10 in 0,01 mm. Length 0,065 mm. Breadth 0,02 mm. — Pl. 36, fig. 24. — Cape Wankarema. The concave valve of this variety is scarcely different from N. incudiformis Grun. N. (Rhotkoneis) obtusa Cl. N. Sp. (Rhoic. obtusa Cl. in Cl. & MO6ll. Diat. 315—318) Elongated, linear, with rounded obtuse ends. Strie curved, not parallel, very faintly lineate, on one half of the valve reaching the median line, on the other end- ing at some distance, irregularly interrupted, 11 in 0,01 mm. Length 0,075 mm. Breadth 0,014 mm. — Pl. 36. fig. 25. — Cape Wankarema. N. (Rhoikoneis) Bolleana Grun. (Verh. 1863, pag. 147, Pl. XIII, fig. 11) Greenl., Spitsb., Finm., Kara (Matotschkin), Cape Wankarema. Specimens from Greenland have 8 radiant strie in 0,01 mm. in the middle, 12 near the ends. Specimens from Wan- karema are less arcuate, have in 0,01 mm. 10 stris, which are almost parallel. The strie are transversely finely lineate as in all species of the directa-group. Mr. Grunow has named this variety from Wankarema Rh. Bolleana var.? Siberica (Cl. & Moll. Diat. No 302.) — Pl. 37, fig. 38. — Another variety from Cape Wanka- rema has asymmetric striation and 11 strie in 0,01 mm. var. asymmetrica Cl. length 0,045 mm. breadth 0,01 mm. Pl. 37, fig. 39. N. kariana Grun. (A. Diat. pag. 39, Pl. II, fig. 44) Kara, F. J. L., Cape Wankarema. a. genuina Strie 12—14 in 0,01 mm. Length 0,085 mm. Breadth 0,026 mm. — Kara, F. J. L., Cape Wankarema. f. detersa Grun. Mpt. Strie interrupted on both sides of the median line by more or less broad areas. Length 0,09 mm. Breadth 0,024 mm. — Kara, F. J. L., Cape Wankarema. — Pl. 36, fig. 36. 7. minor Grun. (A. D. pag. 5. N. frigida Grun. A.D: pag. 39). Striz 16—18 in 0,01 mm. Length 0,04s—0,07 mm. Breadth 0,012—0,013 mm. — Kara, F. J. L. 470 CLEVE, DIATOMS. forma curta Cl. Length 0,0s—0,o4 mm. Breadth 0,000o— 0,01 mm. Strie 12 in 0,01 mm. — Davis strait, Cape Wankarema. Cape Deschnew (East Cape). — PI. 87, fig. 40. N. kariana Grun. passes over to N. transitans, which scarcely differs in anything but coarser strie and is by the latter connected with N. Zostereti and N. directa. According to Grunow the lineation of the strie of N. Kariana forms longi- tudinal fine lines, which may be explained by the approxima- tion of the strie. Nearly allied to N. Kariana seems to me to be the following species. N. subimpressa Grun. (A. Diat. pag. 39, Pl. II, fig. 45) Kara. var.? tenuior Cl. Length 0,038 mm. Breadth 0,015 mm. Striz 18 in 0,01 mm.— PI. 37, fig. 49. Cape Deschnew (East Cape). N. distans Sm. (Syn..I, pag. 56, Pl. XVIII, fig. 169) Greenl., (Davis strait) Spitsb., Finm. var. borealis Grun. (A. Diat. pag. 38, Pl. II, fig. 42) Spitsb., Finm. Sectio: Retuse. N. fortis Greg. (A. Schm. Atl. Pl. XLVI, fig. 37—39) Greenl., Spitsb. N. optima Grun. (A. Schm. Atl. Pl. XLVI, fig. 25—26) Greenl., (Davis strait). N. jamatinensis Cl. (A. Diat. pag. 13, Pl. II, fig. 40) Jalmal, Cape Deschnew (East Cape). N. cancellata Donk. var. impressa Ldt. (N. impressa Ldt. Bih. t. K. Sv. Vet. Ak. Handl. B. III, No 15, pag. 33, fig. 3) Greenl. (Davis strait), Finm., Kara. var. Gregorit Grun. (A. Diat. pag. 37) Finm., Kara. var. subapiculata Grun. (I. ¢.) Kara. var. Schmidtii Grun. (1. c.) Spitsb., Cape Deschnew (East Cape). var. minuta Grun. (1. c.) Finm., Cape Deschnew (East Cape). N. inflexa Greg. (A. Schm. Atl. Pl. XLVI, fig. 69—70) Kara. N. retusa Bréb. Cape Wankarema. I give a delineation of a specimen from Cape Wan- karema, according to Grunow the typic N. retusa. It has been drawn Pl. 36, fig. 35 a, b, from a dry specimen in two different foci. Sectio: Deciprentes. N. Landstromit Cl. (A. D. pag. 18, Pl. II, fig. 29) Kara. N. plicata Donk. (B. D. Pl. IX, fig. 21) Kara. N. subinflata Grun. Mpt. — Linear oblong, more or less gib- bous in the middle, with rounded obtuse ends, very convex. Central striz stronger and more distant, the others rather pa- VEGA-EXPEDITIONENS VEVENSKAPLIGA ARBETEN, 471 rallel, reaching the median line. Length 0,04 mm. Breadth O,oos mm. — Pl. 37, fig. 50. — Greenl. (Bessel’s Bay), Cape Wankarema. Sectio: Punctate. N. pusilla Sm. var jamalinensis Grun. (A. Diat. pag. 40, Pl. I, fig. 40) Kara (Fresh-water species?). N. marina Ralfs (Prit. Inf. pag. 908, W. Sm. Syn. J, pag. 52, Pl. XVI, fig. 151) Greenl. (Davis strait), Finm., Kara (Ma- totschkin), N. cluthensis var.? finmarchica Grun. (A. Diat. pag. 40, Pl. II, fig. 49) Finm. N. septentrionalis Cl. (A. Schm. Atl. Pl. VI, fig. 37) Greenl. (Mushroom Point), Spitsb., Kara (Matotschkin). N. glacialis Cl. (Cocconeis gl. Cl. D. of the A. 8. pag. 14, PI. III, fig. 12, A. Schm. Atl. Pl. VI, fig. 35—39 typical) Greenl., Spitsb., Kara (Matotschkin, Jalmal), Cape Wankarema. In the latter locality there occur-a number of varieties quite different from the typical form. In Pl. 87, fig. 41 I have figured a small variety, which seems to have very little to do with the typical forms. N. humerosa Bréb. (A. Schm. Atl. Pl. VI, ‘fig. 38—5) Finm., Spitsb., Kara (Jalmal). N. latissima Bréb. (A. Schm. Atl. Pl. VI, fig. 7) Finm. Sectio: Didyme. N. Bombus Ehb. (N. gemina A. Schm. N. Sea D. Pl. I, fig. 1) Finm. N. splendida Greg. (T. M. 8. IV, pag. 44, fig. 14) Gisant Beeren Id, Finm., Spitsb. NV. interrupta Kitz (A. Schm. Atl. Pl? XII, fig. 1—5) Greenl., (Mushroom Point), Finm., Spitsb., Kara (Matotschkin, Jalmal). N. didyma Kiitz (A. Schm. Atl. Pl XIII, fig. 1—3) Greenl. ‘(Davis strait), Finin., Spitsb., Kara. N. Crabro Ebb. (A. Schm. N. Sea Diat. Pl. I, fig. 5—6, Pl. II, fig. 4) Finm. N. bomboides var. media Grun. (A. Diat. pag. 41, Pl. II, fig. 54) Greenl. (Mushroom Point), Finm., Spitsb., Kara (Matotschkin). N. Donkinii A. Schm. (N. Sea Diat. Pl. II, fig. 8, Pl. I, fig. 12) Finm. N. incurvata Greg. (A. Schm. N. Sea D. PL I, fig. 10—11, Pl. II, fig. 6) Finm. N. subcincta A. Schm. (N. Sea D. Pl. I, fig. 7. MN. Hawa Ldt. Bih. t. K. Sv. Vet. Ak. Handl. III, No 15, pag. 37, fig. 4) Finm., Kara (Matotschkin). 472 CLEVE, DIATOMS. Sectio: Elliptice. . N. littoralis Donk. (A. Schm. Atl. Pl]. VIII, fig. 28—25) Greenl. (Mushroom Point) Finm., Kara, Cape Deschnew (East Cape). N. Smithii Bréb. (A. Schm. Atl. Pl. VI, fig. 14—22) Greenl. (Mushroom Point) Finm., Spitsb., Kara (Matotschkin, Jalmal), Cape Deschnew (East Cape). N. fusca Greg. (A. Schm. Atl. Pl. VII, fig. 1—4) Finm:, Matotschkin Schar. N. estiva Donk. (A. Schm. Atl. VIII, fig. 26) Finm., Cape Wankarema. N. suborbicularis Greg. (A. Schm. Atl. Pl. VIII, fig. 2—5) Greenl. (Davis strait). N. Eudoxia A. Schm. (Atl. Pl. VIII, fig. 40) Cape Wankarema. N. Tschuktschorum Cl. N. Sp. — Small, oval with rounded ends. The middle of the valve has, as in N. Lyra-section, two arcuate, convergent thickenings, connected by a trans- verse bar at the centre: The space between the margin and the thickenings has coarse, costate strie, 13 in 0,01 mm. Length 0,01 mm. Br. 0,0065. — Pl. 37, fig. 48. — Cape Deschnew (East Cape). This species comés nearest to N. Reichardii Grun. (Van Heurck Syn. Pl. X, fig. 9) which is larger and has closer, punctate strie. The N. Mauleri R. J. Brun (Diat. des Alpes et du Jura Pl. I, fig. 18) is also an allied form, but more nearly related to N. Borussica Cl. (Schr. phys. oek. Ges. zu Kénigs- berg Bd. XXII, pag. 139, A. Schm. Atl. Pl. VIII, fig. 17) in Domblitten deposit. . Sectio: Lyre. N. pygmea Kitz. (A. Schm. N. Sea Diat. Pl. I, fig. 43) Finm., Spitsb., Kara, Cape Deschnew (East Cape). N. abrupta. Greg. (A. Schm. 1. ¢. PI. I, fig. 37) Finm., Spitsb. N. hyalina Donk. (Brit. Diat. Pl. I, fig. 1) Finm. N. forcipata Grev. (A. Schm. N. Sea Diat. Pl. I, fig. 45, PI. Il, fig. 16 & 18) Greenl. (Davis strait). N. spectabilis Greg. (Diat. of Cl. pag. 481, Pl. IX, fig. 10) Greenl. N. circumsecta Grun. (A. Schm. Atl. Pl. ITI, fig. 27—28) Finm. N. Hennedyi Sm. (A. Schm. N. Sea Diat. Pl. I, fig. 41) Greenl., Finm., Spitsb., Kara (Matotschkin). N. Lyra Ebb. (A. Schm. Atl. Pl. I, fig.. 16) Greenl., Finm,., Spitsb., Kara (Matotschkin). var. elliptica A. Schm. (N. Sea Diat. Pl. I, fig. 38—39) Greenl. (Mushroom Point), Finm., Kara. VEG A-EXPEDITIONFENS VETENSKAPIIGA ARBETEN. 473 N. kryophila Cl. — Elliptic oblong or elliptic with parallel sides. Strive coarse, costate, about 8 in 0,01 mni., interrupted by large areas on both sides of the median line, over which areas the faint continuations of the striz are visible. Length O,os. Br. 0,018 mm. — Pl. 37, fig. 43. — Cape Wankarema. N. (kryophila var.?) gelida Cl. — Elliptic. Strie short, marginal, 9 in 0,01 mm., costate, separated from very short striz on both sides of the median line by large areas, over which traces of the stris are visible. Central nodule surrounded by a circular area. Length 0,08 mm. Breadth 0,04 mm. — PI. 37, fig. 42. —. Cape Wankarema. Sectio: Pseudo-amphiprora. N. arctica Cl. (K. Sv. Vet. Ak. Hand]. XVIII, No 5, pag. 3) Finm., Kara (Matotschkin). Sectio: Complexe. N. (Schizonema) Grevillei Ag. (Grun. A. Diat. pag. 42. Nav. Libellus Greg. N. rhombica Greg. Libellus Grevillei Cl. D. of the A. 8. pag. 18) Greenl. (Bessel’s Bay), Finm., Spitsb. The largest specimen I have seen from Greenland measures 0,125 mm. in length and 0,024 mm. in breadth and has in the middle 15 strie in 0,01 mun. N. (Schizonema) comoides Grev. (Van Heurck Syn. Pl. XVI, fig. 3) Cape Deschnew (East Cape). N. complanata Grun. (Amph. complanata Grun. A. Schm. Atl. Pl. XXVI, fig. 45) Finm., Kara. Sectio: Minutule. © N. crassirostris Grun. (A. Diat. pag. 45, Pl. III, fig. 57). Kara. var. maaséensis Grun. (1. ¢.) Finm. N. kryokonites Cl. Elliptic, with obtuse ends. Strie paral- ‘lel, 22 in 0,01 mm., absent or obsolete in the middle of the valve. Length 0,034 mm. Breadth 0,011 mm. — Pl. 37, fig. 44. — Cape Wankarema. var. subprotracta Cl. Rhombic with produced, subcapitate ends, strie 22 in 0,01 mm. Length 0,033 mm. Breadth 0,007 mm. — Pl. 32, fig. 46. — Cape Wankarema. var. semiperfecta Cl. Strie 24 in 0,01 mm., covering one half of the valve, where they are of equal strength, and the other half, except in the middle, where they are obsolete. — Pl. 387, fig. 45. — Cape Wankarema. N. (kryokonites var.?) wankareme Cl. Elongate lanceolate. Median line straight, central nodule small, terminal nodules near the ends. Striz absent from the middle of the valve, 474 CLEVE, DIATOMS. parallel, very fine, about 80 in 0,01 mm. — Pl. 87, fig. 47. — Cape Wankarema. N. Baculus Cl. — Linear, elongate, with rounded ends. Me- dian line broad. Central nodule small. Strie parallel, 19 in 0,01 mm., absent from the middle of the valve, generally in- terrupted or as erased towards the middle. Length 0,065 mm. Breadth 0,007 mm. — Pl. 87, fig. 51. — Cape Wankarema. This species seems to come near N. Fistula A. Schm. N. Sea Diat. Pl. II, fig. 29, which perhaps may be N. inconspi- cua Greg. Diat. of Cl. pag. 478, Pl. IX, fig. 3. I do not know these two species. In some mediterranean gatherings I have seen a Navicula closely resembling N. Bacu- lus, but with finer strie, 26 im 0,01 mm., obsolete or absent from the middle of the valve, but not interrupted as in N. Baculus. Length 0,053, breadth 0,007 mm. It may perhaps be N. Fistula. N. mornata Grun. (A. Diat. pag. 46, Pl. II, fig. 56. N. Acus Cl. 1. ce. pag. 14, Pl. III, fig. 55) Finm. Sectio: Vanheurckia. N. (Schizonema) vulgaris Thwaites — Kara (Fresh-water- species ?). Sectio: Vege. N. Vege Cl. (Pleurosigma Kjellmani Cl. A. D. pag. 4, Pil. IV, fig. 80) — Kara, Cape Wankarema. var. subconstricta Grun. (in litt. c. icone) linear with paral- lel margins, constricted in the middle. Transverse strive 15 1/3. Longitudinal strie 141/3 in 0,01 mm, — Cape Wankarema. Sectio: Decussate. N. Placenta (Ehb.?) Lewis (Grun. A. Diat. pag. 47, Pl. II, fig. 60) Finm. Nav. Incerie sedis. N. perlepida Grun. F. J. L. (unknown to me). Stauroneis aspera Ehb. (St. pulchella W. Sm.), var. interme- dia Grun. Greenl. (Bessel’s Bay, Mushroom Point), Finm., Spitsb., Kara (Matotschkin), Cape Deshnew (East Cape). St. finmarchica Cl. & Grun. (A. Diat. pag. 47, Pl. III, fig. 63) Finm., Kara, Cape Deschnew (East Cape). St. scandinavica Ldt. (Bih. t. K. Sv. Vet. Ak. Handl. III, No 15, pag. 47. Navic. lacustris A. Schm. N. Sea Diat. Pl. J, fig. 29) Kara. St. Spicula Dickie (Van Heurck Syn. Pl. IV, fig. 9) Green]. (Discovery Bay), Spitsb., Cape Wankarema. St. desiderata Ci. (A. Diat. pag. 14, Pl. III, fig. 58) Kara. VEGA-EXPEDITIONENS VETENSKAVLIGA ARBETEN. 475 St. Gregorii Rolfs var. obtusiuscula Grin. (A. Diat. pag. 47, Pl. III, fig. 64) Kara. St. pellucida Cl. — Broadly oval, with rounded, obtuse ends, membranaceous. Central nodule dilated in a short stauros. Strie 20 in 0,01 mm., obsolete, punctate. Length 0,053. Breadth 0,028 mm. — Cape Wankarema. — PI. 35, fig. 10.” St.. pusilla Grun. — F. J. L. — Unknown to me. St. perpusilla Grun. — F. J. L. — Unknown to me. Scoliopleura tumida (Bréb.) Grun. (Nav. tumida Bréb. N. Jen- nevt W. Sm.) Kara. Pleurosigma formosum W. Sm. — Greenl. P. obscurum W. Stu. — Spitsb. P. longum Cl. (D. of the A. 8. pag. 19, Pl. III, fig. 14, Grun. Arct. Diat. pag. 49, Pl. I, fig. 71) Greenl., Finm., Spitsb., Kara (Matotschkin). P. elongatum W. Sm. (Syn. I, pag. 64, Pl. XX, fig. 199) Kara (Matotschkin). var. fallax Grun. (A. Diat. pag. 50, Pl. III, fig. 36) Greenl. (Davis Strait), Finm., Kara. P. delicatulum W. Sm. (Syn. pag. 64, Pi. XXI, fig. 202) Finm., Spitsb., Kara. var. kariana Grun. (A. Diat. pag. 50, PI. III, fig. 69) Kara. P. latum Cl. (A. Diat. pag. 14, Pl. III, fig. 68) Finm. P. affine Grun. (A. Diat. pag. 51. P. naviculaceum Cl. D. of the A. 8. pag. 19) Green]. (Davis Strait), Finm., Spitsb. P. angulatum W. Sm.-° (Syn. I, pag. 65, Pl. XXI, fig. 205) Greenl., Finm., Spitsb. P. Birigosum W. Sm. (Syn. I, pag. 64, Pl. XXI, fig. 203) Finm., Kara. P. estuariti Bréb.. (W. Sm. Syn. I, pag. 65, Pl. XXXI, fig. 275) Finm. P. finmarchicum Cl. (= P. Normani Cl. A. D. pag. 14, Pl. III, fig. 67) Finm. P. Clevei Grun. (A. Diat. pag. 52, Pl. III, fig. 70) Kara. var. siberica Grun (in litt. ¢. icone) Strie, oblique and transverse, 28 in 0,01 mm. Cape Wankarema. PI. 35, fig. 14. P. nubecula W. Sm. (Syn. I, pag. 64, Pl. XXI, fig. 201) Finm. P. intermedium W. Sm. (Syn. I, pag. 64, Pl. XXI, fg: 200) Finm., Spitsb. var. subrecta Cl. (A. Diat. pag. 14, Pl. III, fig. 72) Greenl., Finm., Spitsb. P. rigidum W. Sm. (Syn. I, pag. 64, PL XX, fig. ee Greenl., Spitsb. 476 OLEVE, DIATOMS, P. rhomboides Cl. (A. D. pag. 14, Pl. IV, fig. 73) Kara, Cape Wankarema, F. J. L. var. angustior Grun. — F. J. L. P. Stuxbergii Cl. & Grun. (A. Diat. pag. 54, Pl. IV, fig. 74) F. J. L., Kara, Cape Wankarema. var.? hyperborea Grun. (transy. striz 221). oblique 251), in 0,01 mm.) P. distortum W. Sm. (Syn. I, pag. 67, Pl. XX, fig. 210) Spitsb. (longit. strie 28, transverse 25 in 0,01 mm.). P. Fasciola W. Sm. (Syn. I, pag. 67, Pl. XXI, fig. 211) Greenl., Finm., Spitsb., Kara. var. sulcata Grun. (A. Diat. pag. 55, PI. IV, fig. 75) Spitsb., Kara. var. tenuirostris Grun. (A. Diat. pag. 55, Pl. IV, fig. 76) Kara. P. balticwn W. Sm. (Syn. IJ, pag. 66, Pl. XXII, fig. 207) Spitsb. P. Wansbecktti Donk. (T. M. S. VI, pag. 24, Pl. II, fig. 7) Kara. P. macrum W. Sm. (Syn. I, pag. 67, Pl. XXXT, fig. 276) Kara. P. prolongatum W. Sm. (Syn. I, pag. 67, Pl. XXII, fig. 212) Spitsb., Kara. P. tenuissimum W. Sm. (Syn. I, pag. 67, Pl. XXII, fig. 213) Spitsb., Kara. var. subtilissima Grun. (A. Diat. pag. 58) Kara. var. hyperborea Grun. (l. c.) Kara, Cape Wankareima. P. Spenceri var. borealis Grun. (A. Diat. pag. 60, Pl. 1V, fig. 79) Kara. ; . Of P. Spenceri I found in a sample from Hackluyts, Spitsb.. a variety with 19 transverse and 24 longitudinal strie, length 0,11, breadth 0,013 mm. In the Wankarema gatherings occurs another variety with 20 transverse and 26 longit. strie in 0,01 mm., length 0,085 mm., breadth 0,008 mm. P. vitreum Cl. (A. D. pag. 15, Pl. IV, fig. 78) Kara, Cape Wankarema (transverse strie 19, longit. 20 in 0,01 mm.). P. glaciale Cl. N. 8. — Sigmoid, acute, med. line almost straight. Longit. and transverse strie 28 in 0,01 mm. Length 0,143. Breadth 0,019 mm. — PI. 36, fig. 18. — Cape Wankarema. P. staurophorum Grun. A. Diat. pag. 61) Green]. (Davis Strait). Donkinia carinata (Donk.) Ralfs (Donkin T. M.S. VI, pag. 23, Pl. III, fig. 5) Greenl. (Davis strait, Length 0,1 mm. Breadth 0,02 mm. Oblique strie 18 in 0,01 mm.) Finm. VEGA-EXPEDITIONENS VETENSKAPLIGA ARBETEN. 477 D. minuta (Donk.) Ralfs (Donkin 1. ¢c. f. 8) Finm. Rhoicosigma arecticum Cl. (D. of the A. S. pag. 18, Pl. ITI, fig. 16) Greenl., Finm., Spitsb., Kara (Matotschkin). Specimens from Hackluyts, Spitsbergen, have 21—22 strie in Q,o1 mm. R. Reichhardii Grun. (M. J. 1877, pag. 181, Pl. CXCV, fig. 19) Kara, Cape Wankarema. R. compactun (Grev.) Grun. (Pleuros. comp. Grev. M. J. V. pag. 12, Pl. IV, fig. 9) Kara. Amphiprora (Plagiotropis) scaligera Grun. (A. D. pag. 66, Pl. V, fig. 90) Finm. A. longa Cl. (Diat. A. 8. pag. 20, Pl. III, fig. 15) Finm., Spitsb., Kara (Matotschkin). A, maxima var. dubia Cl. & Grun. (A. Diat. pag. 65, Pl. V, fig. 89) Finm. A. plicata v. subplicata Grun. (A. Diat. pag. 65, Pl. V, fig. 88) Kara, Cape Wankarema. A. (amphitropis) paludosa W. Sm. — Greenl. (Discovery Bay) Finm. var. Pokornyana Grun, (Verh. 1860, pag. 569, Pl. IV, fig. 9) Kara. var.? hyperborea Grun. (A. Diat. pag. 62, Pl. V, fig. 86) Kara. var.? polaris Grun. Mpt. — F. J. L. var. punctulata Grun. (A. Diat. pag. 62, Pl. IV, fig. 84) Kara, Cape Wankarema. var.? borealis Grun. (1. c. Pl. IV, fig. 85) Kara, Cape Wan- karema. var.? duplez Donk. (Van Heurck Syn. Pl. XXII, fig. 15—16) Green]. (Discovery Bay), Spitsb. A. (Amphitropis) Kjellmani Cl. (A. Diat. pag. 15, Pl. IV, fig. 83). Kara, Cape Wankarema. A. (Amphitropis) kryophila Cl. — Large, median line strongly sigmoid. Junction-line between the keel and the carina wavy. Strie on the carina ending in small puncta, 183—17 in 0,01 mm. closer than on the valve, 10—14 in 0,01 mm. Length 0,13 —0,16 mm. Breadth of valve 0,017 mm. of frustle 0,04s—0,045 mm., at the constriction 0,02s—0,03 mm. — PI. 365, fig. 11. — Cape Wankarema. A, (Amphitropis?) glacialis Cl. — Frustle almost linear, very little constricted in the middle; junction-line between the carina and the valve wavy. Stris on the keel 14 in 0,01 mm. more distant than on the valve, 19 in 0,01 mm. PI. 35, fig. 12. 478 CLEVE, DIATOMS. Length 0,07 mm. Breadth 0,015 mm. — Cape Wankarema. Perhaps a variety of the following. ‘A. (Amphitropis?) striolata Gran. (A. Diat. pag. 62, Pl. IV, fig. 81) Kara. A. (Amphitropis?) kariana Grun. (A. Diat. pag. 61, Pl. IV, fig. 82) Kara. A. (Amphitropis) decussata Grun. var. septentrionalis Grun. (A. Diat. pag. 63, Pl. V, fig. 87) Finm., Cape Wankarema. Specimens from Wankarema are very large, 0,14—0,13 mm. in length, and have 20—22 strie on the valve. Median line sigmoid. 7. Amphipleuree. Berkeleya Dillwynti Grun. (Van Heurck Syn. Pl. XVI, fig. 15) Spitsb., Kara, Cape Deschnew (East Cape) (strie 24 in 0,01 mm). 8. Nitzschiez. Sectio: Tryblionella. N. Tryblionella Hantzsch. (Grun. A. Diat. pag. 69) var. Victorie Grun. — Kara. var. levidensis W. Sm. — Finm., Kara. N. navicularis (Bréb.) Grun. (Trybl. marginata Sm.) Spitsb. — Ihave indicated this species in the D. of the A. 8. as. an inhabitant of the Arctic Sea, but not having afterwards found it, I am uncertain as to the exactness of the determination. N. (?) seriata Cl. N. Sp. — Fusiform with gradually attenua- ted ends. Puncta indistinct. Strie 16—18 in 0,01 mm. per- vious. Frustules coherent in long bands. Length 0,00o—0,1: mm. Breadth 0,008 mm. — Pl. 38, fig. 75. — Greenland, one gen (N. O. Holst). I am very uncertain as to the exact position of this dia- tom, whose nearest allies seem to be N.? (Homoecocladia) pungens Grun. Mpt. (Cl. & Mall. Diat. No 807) from Japan, also the Fragilaria (?) Cylindrus Grun. Mpt. Sectio: Panduriformes. N. panduriformis Greg. var. delicatula Grun. (A. Diat. pag. 71, Pl. V, fig 92) Finm., Spitsb. N. constrica Kiitz. In the Diat. of the Arctic Sea I have indicated this species as occurring near Spitsbergen, but I cannot be sure of the correctness of the determination, not having found it afterwards. VEG A-EXPEDITIONENS VETENSKAPLIGA ARBETEN. 479 Sectio: Apiculate. N. marginulata Grun. a. genuina Grun. (A. Diat. pag. 72, Pl. V, fig. 93) Kara (Matotschkin). var. minuta Grun. (1. c.) Cape Deschnew (East Cape) (length 0,045 mm. puncta 12 and strize 24 in 0,01 mm.) Green]. (Mushroom Point). N. apiculata (Greg.) Grun. (A. Diat. pag. 73) Greenl., Finm. Sectio: Dubie. N. dubia W. Sm. (Grun. A. D. pag. 77) Kara, Cape Desch- new (East Cape). In the East Cape gathering occurs a small form, only 0,065 mm. in length, with 8 puncta and 29 strie in 0,01 mm. N. Wankareme Cl. N. Sp. — Keel not very eccentric; carinal puncta 5—7 in 0,01 mm. absent in the middle, where there is an indication of a central nodule. Strie very fine, about 30 in 0,01 mm. Length 0,1s—0,17 mm. — PI. 38, fig. 71. — Cape Wankarema. Sectio: Bilobate. N. hybrida Grun. (A. Diat. pag. 79) Spitsb., Finm., Kara. var. kryokonites Cl. — Length 0,13. Carinal puncta 9 in 0,01 mm. Strie very fine, about 30 in 0,01 mm. Keel not very eccentric. Valve slightly constricted in the middle. — Pl. 38, — fig. 65. Cape Wankarema. var.? pellucida Grun. (A. Diat. pag. 80, Pl. V, fig. 96) Finm. N. Mitchelliana Greenl. (Grun, A. Diat. pag. 80, Pl. V, fig. 97) Finm., Spitsb., Kara. Sectio: Pseudo-amphiprora. N. Amphiprora Grun. (A. Diat. pag. 81. Amphipr. Nitz- schioides Cl. D. of A. 8S. pag. 20, Pl. IV, fig. 18) Greenl., Spitsb., Cape Deschnew (East Cape). Sectio: Insignes. . WN. insignes var. arctica Grun. (A. D. pag. 84) Greenl., Finm., Spitsb., Kara (Matotschkin). var.? marginifera Grun. (A. Diat. pag. 84. Pl. VI, fig. 105) Finm. Sectio: Bacillaria. N. socialis Greg. (Van Heurck Syn. Pl. LXI, fig. 8) Greenl., Finm., Kara (Matotschkin). var. kariana Grun. (A. Diat. pag. 85, Pl. VI, fig. 108) Greenl. (Davis strait), Kara. var. baltica Grun. (1. ¢. fig. 107) Kara, Cape Wankarema. N. paradoxa (Gmel) Grun. (Van Heurck Syn. Pl. LXI, fig. 6) Kara. c Sectio: Vivaces. . N. (vivax var.?) hyperborea Grun. (A. D. pag. 86, PI. V. fig. 104) Kara. 480 CLEVE, DIATOMS. var.? Nystrémii Grun. (Cl. & M. Diat. No 172) Greenl. (Davis Strait), not known to me. Sectio: Spathulate. N. angularis W. 8m. (Van Heurck Syn. Pl. LXII, fig. 11— 14) Greenl., Finm., Kara (Matotschkin), Cape Deschnew (East Cape). var. borealis Grun. (A. Diat. pag. 89, PI. V, fig. 99) Finm., Kara. var. kariana Grun. (1. ¢c. p. 89, fig. 100) Kara. N. spathulata Bréb. (Van Heurck Syn. PI. LXII, fig. 7—8) Greenl. (Davis Strait), Finm. var. hyalina Greg. (Van Heurck Syn. 1. c. f. 9) Kara. Sectio: Sigmoidee. N. macilenta Greg. — In the Diat. of the A. S I have indicated this species as occurring near Spitsbergen, but, not having met this species again, I think it may be a mistake. N. Brebissoni var. borealis Grun. (Cl. & M. Diat. 316—318) Strie 14—16 in 0.0.1 mm. Cape Wankarema. Sectio: Sigmata. N. Sigma Sm. (Amphipleura rigida Cl. D. of the A. Sea pag. 26. Amphipleura sigmoidea W. Sm.) Greenl., Finm., Spitsb. N. (Sigma var.?) scabra Cl. — Valve large, in length 0,1;— 0,2 mm. breadth 0,01 mm., slightly sigmoid, or almost straight. Keel eccentric. Puncta about 4 in 0,01 mm. Strie not seen, but the surface of the valve is covered by scattered puncta, which give it a shagreen-like appearance. — Pl. 38, fig. 73 a. b. — Cape Wankarema. N. levissima Grun. Mpt. — Greenl. (Discovery Bay), F. J. L, Cape Wankarema. Sectio: Obtuse. N. (obtusa var.??) kryophila Cl. Linear, slightly sigmoid toward the ends. Puncta 8, absent in the middle, where there is a small central nodule. Strize 20 in 0,01 mm., composed of puncta. Length 0,14 mm. Breadth 0,006 mm. — PI. 388, fig. 74. — Cape Wankarema. Sectio: Lineares. N. gelida Cl. & Grun. Straight with cuneate ends. Keel tolerably eccentric. Carinal puncta 6—8 in 0,01 mm., distant in the middle, where there is a distinct central nodule. Stria composed of somewhat elongate puncta, which form irregularly wavy lines, 20—24 in 0,1 mm. Length 0,14 mm. Breadth 0,012 mm. — Pl. 38, fig. 70. — Cape Wankarema. N. (recta var.?) polaris Grun. — Valve tolerably eccentric, linear with obtuse ends. Carinal puncta 7 in 0,01 mm., distant VEG A-EXPEDITIONENS VETENSKAPLIGA ARBETEN. 481 in the middle. Strie very fine. Length 0,075 mm. Breadth 0,006 mm. — Pl. 38, fig. 72. — F. J. L., Cape Wankarema. N. linearis var. tenuis Grun. (A. D. pag. 93) Kara, Cape Wankarema. (Specimen from the latter locality have 11—12 puncta and 28—80 strie in 0,01 mm. Length 0,13 mm. Breadth Q,oo9 mm.). N. vitrea Norm. (Van Heurck Syn. Pl. LXVII, fig. 10) Spitsb. var. finmarchica Grun. (A. D. pag. 94, Pl. VI, fig. 106) Finm. In the Wankarema gathering occurs a variety of N. vitrea 0,12 mm. in length 0,006 mm. in breadth with 8—10 puncta in 0,01 mm. and very fine strie. In the Discovery Bay gather- ing occurs another variety with 8—9 puncta and 25 strie in 0,01 mm. N. frigida Grun. (A. Diat. pag. 94, Pl. V, fig. 101) Greenl. {Discovery Bay), Kara. Sectio: Lanceolate. N. lanceolata var. pygmea Cl. — Lanceolate, length 0,045 mm. Breadth 0,006 mm. Puncta 12 in 0,01 mm. Strie very fine. — Cape Wankarema. Seems to connect N. lanceolata with N. acicularis. N. ovalis Arn. (Grun. A. Diat. pag. 95, PI. V, fig. 103) Kara. Sectio: Niteschiella. N. Closterium (Ebb.) W. Sm. (Van Heurck Syn. Pl. LXX fig. 5) Finm., Spitsb., Kara. N. acticularis W. Sm. (Van Heurck Syn. 1. ¢. fig. 6) Kara, Cape Wankarema. Hanteschia amphioxys (Ehb.) Grun. — Kara (Fresh-water species). var. vivax Grun. (A. Diat. pag. 103) Kara. HA. Weiprechtiti Grun. (A. Diat. pag. 104, Nitzschia Weipr. Grun. in Van Heurck Syn. Pl. LXII, fig. 16) F. J. L. H. virgata Roper var.? borealis Grun. (A. Diat. pag. 104, Pl. VI, fig. 110) Kara. var.? kariana Cl. & Grun. (1. ¢. fig. 109) Kara. H. marina (Donk.) Grun. (Van Heurck Syn. Pl. LVI, fig. 14 —15) Greenl. (Davis Strait). 9. Surirelle. Surirella Smithii Ralfs (S. constricta W. Sm. Syn. I, pag. 31, Pl. VIII, fig. 59) Finm. S. fastuosa var. lepida A. Schm. (Atl. Pl. IV, fig. 7) Finm. S. Gemma Ehb. (Van Heurck Syn. Pl. LXXIV, fig. 1) Spitsb. Ba Il. 31 482 OLEVE, DIATOMS. S. ovata Kitz. (Van Heurck Syn. Pl. LXXIII, fig. 5—7) Spitsb. Campylodiscus Helianthus A. Schm. (Atl. Pl. XVII, fig. 15) Spitsb., Kara (Matotschkin Schar). C. grénlandicus Cl. (D. of A. Sea pag. 18, Pl. II, fig. 9) Greenl. C. angularis Greg. (A. Schm. Atl. Pl. XVIII, fig. 7) Greenl., Finm., Spitsb., Kara (Matotschkin). C. Ralfsii W. Sm. (Syn. I, pag. 30, PI. XXX, fig. 257) Green]. (Davis Strait). C. Thurett Bréb. (C. simularis Greg. C. bicruciatus Greg.) _ Greenl., Spitsb., Finm., Kara (Matotschkin). C. echineis Ehb. (0. Argus Bail. C. cribrosus Sm.) Spitsb. 10. Synedree. Synedra niteschioides Grun. (Verh. 1862, pag: 403, Pl. VIII, fig. 18) Green]. (Davis Strait, Besse’ls Bay [Length 0,o¢ mm., breadth 0,003 mm. Strie 11 in 0,01 mm.] Mushroom Point), Spitsb. var. minor Grun. (Nov. pay. 95, Pl. A. fig. 7) Kara. S. tabulata Kg. (W. Sm. Syn. I, pag. 72, Pl. XII, fig. 96) Greenl. (Bessel’s Bay. Length 0,113 mm. Breadth 0,005 mm. Striee 93/. in 0,01 mm.), Spitsb., Kara. var. angusta Grun. (A. Diat. pag. 105) Finm. S. affinis Kitz. — Green]. (Mushroom Point, Bessel’s Bay, a variety, length 0,24 mm., breadth 0,o009, strize 19 in 0,01 mm.) Finm., Spitsb., Cape Deschnew (East Cape). var. delicatula Grun. (A. D. pag. 105, Pl. VI, oe 115) Finm. var. borealis Grun. — Finm.. S. hyperborea Grun. Mpt. — Boal var. brevis Grun. — F. J. L. var. flexuosa Grun. — F. J. L. var. rostelata Grun. — F. J. L. S. investiens W. Sm. — Greenl. (Strie 13 in 0,01 mm. Length 0,05 mm. Breadth 0,006 mm.) F. J. L. S. kamtischatica Grun. (Verh. 1862, pag. 404, Pl. VIII, fig. 6) Greenl. (Davis Strait, Bessel’s Bay, Mushroom Point), Finm., Spitsb., Kara (Matotschkin), East Cape. var. minor Grun. (A. Diat. pag. 106) Greenl. oe s Bay), Finm. var. intermedia Grun. (1. c. Pl. VI, fig. 111) Finm, var. Kjellmanii Cl. & Grun. (1. ¢. fig. 112) Finm. VEGA-EXPEDITIONENS VETENSKAPLIGA ARBETEN. 483 var. connectens Grun. (1. ¢.) Finm. var. finmarchica Cl. & Grun. (1. ¢. fig. 113) Finm. S. commutata Grun. (A. D. pag. 107, Pl. VI, fig. 118) Greenl. (Mushroom Point, strie 12 in 0,01 mm.). Finm. S. fasciculata Kitz (Grun. A. Diat. pag. 105, Pl. VI, fig. 114) Finm. ‘ 8. parva Kitz. — Finm. var. major Grun. (A. Diat. pag. 106, Pl. VI, fig. 117) Finm. 8. pulchella Kitz. — Finm. var. minutissima (W. Sm.) Finm. var. Vertebra Greg. — Finm. 8. crystallina (Ag.) Sm. (Syn. I, pag. 74, Pl. XII, fig. 101) Finm. S. superba var. minor Grun. (A. Diat. pag. 108) Finm. Sceptroneis marina (Greg.) Grun. (Van Heurck Syn. Pl. XXXYII, fig. 2) Finm. 8.2 gemmata Grun. (Van Heurck Syn. Pl. XXXVI, fig. 3) »Arctic Ocean». Thalassiothrix longissima Cl. & Grun. (A. D. pag. 108) North Atlantic Ocean, Cape Wankarema. Th. Fraunfeldii var.? arctica Grun. (Van Heurck Syn. XXXVII, fig. 14) North Atlantic Ocean. Th. Fr. var.? tenella Grun. (1. ¢. fig. 15) North Atlantic Ocean. (1. Plagiogramme. Plagiogramma stawrophorum (Greg.) Heib. (P. Gregorianum Grey. Dentic. stauroph. Greg. D. of Cl. pag. 496, Pl. X, fig. 37) Greenl.. (Davis Strait) Finm. B. Coccochromatice. 12. Fragilariex. Fragilaria oceanica Cl. (Diat. of the A. 8. pag. 22, PI. IV, fig. 95. F. arctica Grun. A. Diat. pag. 110, Pl. VII, fig. 124) Greenl. (Tindingen, Bessel’s Bay) Northern Atlantic Ocean, Kara. A careful examination has proved the identity of F. oceanica. Cl. and F. arctica Grun., and that my figure in D. of 484 CLEVE, DIATOMS. A. S. is somewhat incorrect. The strie are pervious as in Grunow’s delineation. F. islandica Grun. (Van Heurck Syn. Pl. XLV, fig. 37) Jan Mayen. var. hyperborea Cl. — Area longer, strie 12 in 0,01 mm. — Greenl., Bessel’s Bay. , F.? Cylindrus Grun. Mpt. — Small, linear with parallel sides and broadly rounded ends. Strie pervious 14—21 in 0,01 mm. Length 0,0ss—0,oc mm. Breadth 0,002—0,004 mm. — PI. 87, fig. 64 a. b. c. — Greenl., Tindingen, F. J. L., Cape Wankerema. Grammonema striatulum Ag. (Sm. Syn. II, pag. 23, Pl. XXXV, fig. 298) Green]., Finm., Spitsb. 13. Meridionez. Asterionella kariana Grun. (A. Diat. pag. 110, Pl. VL fig. 121) Kara. 14. Tabellariez. Grammatophora oceanica (Ehb.) Grun. (G. macilenta W. Sm.) Greenl. G. arctica Ol. (6fvers. K. Sv. V. Ak. Forh. 1867, -pag. 664, Pl, XXIII, fig. 1. Van Heurck Syn. LIII B., fig. 3) Greenl. (Bessel’s Bay, Assistance Bay etc.), Finm., Spitsb., Kara (Ma- totschkin). G. arcuata Ebb. (Grun. Verh. 1862, pag. 420, Pl. XI, fig. 7) var. arctica Grun. (Bot. Centr. Bl. 1881, Bd VII, pag. 3) Greenl., Spitsb., Kara (Matotschkin), East Cape. G. angulosa var. islandica (Ehb.) Grun. (Van Heurck Syn. Pi. LII, fig. 7) Green]. (Bessel’s Bay), Finm., Spitsb., Kara (Ma- totschkin). Rhabdonema Torellii Cl. (D. of the A. Sea pag. 24, Pl. IV, fig. 20) Greenl. (Bessel’s Bay), Spitsb. R. arcuatum (Lyngb.) (W. Sm. Syn. II, pag. 34, Pl. XX XVIII, fig. 305) Green]. (Bessel’s Bay), Finm., Spitsb., Kara (Matot- schkin), Cape Deschnew (East Cape). R. minutum (Kg.) (Sm. Syn. II, pag. 35, Pl. XXXVIII, fig. 306) Greenl., Finm., Spitsb., Kara (Matotschkin). The Rh. adiaticwm (Kg.) has been found once in a sample from Grétsund in Finmarken, but in no other arctic gathering. VEGA-EXPEDITIONENS VETENSKAPLIGA ARBETEN. 485 Striatella unipunctata (Lyngb.) Sm. (Syn. II, pag. 37, Pl. XXXIX, fig. 807) Finm. St. chilensis Grun. (Nov. pag. 96, Pl. I A., fig. 7) Greenl. Only one frustle has been observed, so that it may be doubtful as an arctic species. St. delicatula Kiitz. var. rectangula Ktitz. (Van Heurck Syn. Pl. LIV, fig. 3) Greenl., Bessel’s Bay. 15. Licmophoree. Licmophora grandis (Kiitz.) Grun. (Van Heurck Syn. Pl. XLVIITI, fig. 2) Spitsb. (Hackluyts) Strie at the base 22 in 0,01, at the top 24 in 001 mm. Length 0,11 mm. Breadth 0,027 mm. L. JSiirgensii (Kiitz.) Grun. (Van Heurck Syn. Pl. XLVI, fig. 10—-11) Greenl. (Bessel’s Bay) Kara. var. finmarchica Grun. (A. Diat. pag. 110, Pl. VII, fig. 125) Finm.~ L. borealis (Kitz) Grun. — Kara (sec. Grun.). L. nubecula (Kititz) Grun. — Kara (sec. Grun.). L. flabellata Ekb. forma brevior — Finm. (sec. Grun.). L. elongata (Kitz) Grun. — This species has been indicated by myself as occurring in Finmarken, but I have some doubts about the correctness of the determination. 16. Biddulphiez. Triceratium, Biddulphia. B. aurita (Lyngb.) Bréb. (Sm. Syn. I, pag. 49, Pl. XLV, fig. 319) Greenl. (Bessel’s Bay, Mushroom Point), Finm., Spitsb., Kara (Matotschkin), Cape Wankarema. B. Rhombus Ebb. (Sm. Syn. I, pag. 49, Pl. XLV, fig. 320) Finm. B. Balena (Ehb.) Btw. (M. J. VII, pag. 18, Pl. IX, fig. 15. Zygoceros radiatus Bail. Smith’s Contr. VII, Pl. I, fig. 29. Tri- ceratium arcticum Btw. 1. ¢. triangular form) Greenl. (Bessel’s Bay), Finm., Spitsb., Kara. var. J. spitsbergense Grun. (A. Diat. pag. 111) Spitsb. T. finmarchicum Grun. (A. Diat. pag. 112, Pl. VII, fig. 126) Finm. 486 CLEVE, DIATOMS. 17. Isthmiex. Isthmia enervis Ehb. (W. Sm. Syn. II, pag. 52, Pl. XLVI) Finm. I nervosa Kiitz. (W. Sm. Syn. II, pag. 52, Pl. XLVII) Bee- ren Id, Iceland, Finm., Spitsb. 18. Eucampiez. Eucampia Payert Grun. Mpt. — F. J. L. 19. Rhizosoleniez. Rhazosolenia styliformis Btw (Van Heurck Syn. Pl. LXXVIII, fig. 1—5) Greenl. (Davis Strait), Northern Atlantic Ocean, Finm., Kara. R. setigera Btw. (Van Heurck Syn. Pl. LXXVIII, fig. 6—8) Northern Atlantic Ocean, Cape Wankarema. R. alata Btw. (M. J. VI, pag. 95, Pl. V, fig. 8) Greenl. (Tindingen), Northern Atlantic. R. Shrubsolii Cl. (Van Heurck Syn. Pl. LXXIX fig. 11—18) Northern Atlantic. R. hebeta Bail (Brightw. M. J. VI, Pl. V, fig. 4) Cape Wan- karema. F. J. L., Behring Sea. The only figure given of this species is very imperfect, for which reason I have given another. Pl. 38, fig. 69. — Length of frustle 0,5 Breadth 0,03 mm. Strie punctate, 25 in 0,01 on the connecting membrane, crossing each other in three direc- tions. Pyzilla? baitica Grun. (A. Schm. N. Sea. Diat. Pl. III, fig. 25. Van Heurck Syn. Pl. LXXXIII, fig. 1—2) Cape Wankarema. Pycilla? variabilis Grun. (Van Heurck Syn. LXXXIII, fig. 3—4) »Arctic Ocean». 20. Chztocerez. Chetoceros decipiens Cl. (D. of the A. Sea pag. 11, Pl. I, fig. 5) Greenl. (Davis Strait, Tindingen) Northern Atlantic. var. concreta Grun. (A. Diat. pag. 120) together with the genuine form. VEG A-EXPEDITIONENS VETENSKAPLIGA ARBETEN. 487 The awns are transversely striate, strie being 15 in 0,01 mm. C. atlanticus Cl. (1. c. Pl. I, fig. 8 a) Greenl. (Davis Strait, Tindingen), Northern Atlantic. var. attenuata Grun. (A. Diat. pag. 121. Cl. D. of A. Sea l. c. fig. 8 b). var. tumescens Grun. (Van Heurck Syn. Pl. LXXXI, fig. 6). C. pelagicus Cl. (D. of the A. Sea pag. 11, Pl. I, fig. 4) Northern Atlantic Ocean. In some specimens the awns have distant papille. C. connivens Grun. (in Cl. & M. Diat. No 118) Northern Atlantic. C. Wighami Btw. (M. J. IV, pag. 108, Pl. VII, fig. 19—36) Greenland (Davis Strait), Northern Atlantic: Ocean. forma minuta Grun. (A. Diat. pag. 120, Pl. VII, fig. 1384) Kara. C. borealis Bail. (Smith. Contr. VII, pag. 8, fig. 22—23) Greenl. (Tindingen), Northern Atlantic, Kara, Cape Wankarema. var. Brightwellit Cl. (D. of A. 8. pag. 12, Pl. II, fig. 7) Davis Strait, Northern Atlantic Ocean. C. peruvianus Btw. (M. J. IV, pag. 107, Pl. VII, fig. 16— 18) Davis Strait, Northern Atlantic. C. Lorenzianus Grun. var. parvula Grun. (A. D. pag. 120, Pl. VII, fig. 188) Kara. C. furcellatus Bail? (Grun. A. Diat. pag. 120,. PL, VI, fig. 136) Northern Atlantic Ocean. This peculiar form is the auxospore of a species nearly related to C. socialis Laud. (T. M. 8. XII, pag. 77, Pl. VIII fig. 1). var. mamillaris Grun. (A. Diat. pag. 120, Pl. VII, fig. 37) Kara. C. karianus Grun. (A. Diat. pag. 120, Pl. VII, fig. 185) Kara. Syndendrium Diadema Ehb. (Btw. M. J. IV, Pl. VIII, fig. 49—52) Northern Atlantic, Cape Wankarema. Evidently the auxospores of several species of Cheetoceros. Dicladia Mitra Bail. (Sillim. Am. Journ. 1856, pag. 4, PI. I, fig. 6. D. grenlandica Cl. D. of the A. S. pag. 12, Pl. II, fig. 10) Greenl., Kara (Matotschkin Schar), Cape Wankarema. ? 21. Melosirez. Asteromphalus Hookert Grev. var. (A. Brookei Cl. D. of the A. 8. pag. 10, Pl. IV, fig. 19) Greenl. (Davis Strait). Actinoptychus undulatus Ehb. (A. Schm. Atl. Pl. I, fig. 4) Cape Wankarema. 488 CLEVE, DIATOMS. Actinocyclus alienus Grun. (Cl. & MOll. Diat. No 319) Cape Wankarema. — Unknown to me. Coscinodiscus Oculus Ividis Ehb. — Greenl., Spitsb., Cape Wankarema. var. borealis Bail. — Cape Wankarema. C. radiatus Ehb. — Green]. (Davis Strait), Beeren Eiland, Finm., Spitsb. C. concinnus Roper (M. J. VI, pag. 20, Pl. III, fig. 12) Spitsb., Cape Wankarema. C. centralis Ehb. (Greg. Diat. of Cl. pag. 501, Pl. XI, fig. 49) Spitsb., Green]., Tindingen (A. Schm. Atl. Pl. LXIII, fig. 1). var. micraster Grun. (Cl. and Moll. Diat. No 172) Davis Strait. ; C. subtilis Ehb. (A. Sch. Atl. LVII, fig. 13—14) Greenl., Finm., Kara (Jalmal), Cape Wankarema. C. excentricus Ehb. — Greenl. (Davis Strait), Spitsb., Kara, Cape Wankarema. C. lineatus Ehb. — Beeren Ed, Spitsb., Finm., Kara (Jalmal). C. nitidus Greg. (A. Schm. N. Sea Diat. Pl. III, fig. 32) Greenl. (Davis Strait), Finm. C. subglobosus Cl. and Grun. (Cl. and Mdéll. Diat. No 172, A. Schm. Atl. Pl. LVIII, fig. 44) Green]. (Davis Strait), Cape Wankarema. C. (Odontodiscus) curvatulus Grun. (A. Schin. Atl. Pl. LVII, fig. 33) Greenl. (Davis Strait), F. J. L., Cape Wankarema. C. Normanni Cl. D. of A. §. pag. 6 is only a variety of C. curvatulus. var. kariana Grun. (A. Diat. pag. 113, Pl. VII, fig. 129) Finm., Kara. var. frigida Grun. — F. J. L. C. concavus Greg. (D. of Cl. pag. 500, Pl. X fig. 47) Kara. C. (Odontodiscus) polyacanthus Grun. (A. D. pag. 112, Pl. VII, fig. 127) Greenl. (Tindingen) Kara (Jalmal). C. (Odontodiscus) hyalinus Grun. (A. D. pag. 113, Pl. VII, fig. 128) Green]. (Tindingen) F. J. L., Kara, Cape Wankarema. C. (Odontodiscus) bioculatus Grun. Mpt. — Green]. (Tindin- gen), F. J. L., Cape Wankarema. C. (Odontodiscus) pellucidus Grun. (in Cl. & Moll. Diat. No 172) Davis Strait, Cape Wankarema. Valve very thin and transparent, 0,o6s—0,0s mm. i diame- ter, covered with small puncta, arranged in repeatedly branch- ing lines (16 in the middle and 20 in the margin on 0,01 VEGA-EXPEDITIONENS VETENSKAPLIGA ARBETEN, 489 mm.) Centre with some small, scattered puncta. Margin with small spines (6 in 0,01 mm.). C. (Odontodiscus) granulosus Grun. (A. D. pag. 113, Pl. VU, fig. 180) Finm., Kara. C. (Odontodiscus) lacustris Grun. (A. D. pag. 114) Matotschkin Schar, Kara. var. marinus Grun. (in Cl. & Moll. Diat. No 172) Davis Strait. var. hyperboreus Grun. (Cl. & M@ll. Diat. No 315—18) with coarser puncta. — Cape Wankarema. C. bathyomphalus Cl. N. Sp. — Dise 0,02—0,03 mm. in diame- ter, with funnel-shaped centre. Puncta arranged in lines, radia- ting from the centre to the margin, where they become smal- ler. — PI. 38, fig. 81, — Spitsb., Cape Wankarema. Stephanodiscus Hanteschii Grun. var. pusilla (A. D. pag. 115, Pl. VII, fig. 182, Van Heurck Syn. Pl. XCV, fig. 11) Finmark. Thalassiosira Nordenskidldii Cl. (Van Heurck Syn. PI. LXXXIII, fig. 9) Greenl., Northern Atlantic Ocean, Finmarken, Spitsbergen, Kara, Cape Wankarema. Hyalodiscus scoticus (Kg.) Grun. (A. D. pag. 116) Greenl. (Bessel’s Bay, Mushroom Point) Finm., Spitsb., East Cape. Podosira hormoides Mont. (Van Heurck. Syn. Pl. XXXIV) Greenl. (Mushroom Point). var. adriatica (Kiitz.) Grun. — Finm. P. maxima (Kiitz.) Grun. (Casp. Sea Alg. pag. 33. A. D. pag. 118, Hyal. arcticus Cl. & M@ll. Diat. No 1. H. stelliger D. of A. 5. pag. 4) Greenl., Finm., Spitsb., Matotschkin Schar, Cape Deschnew (East Cape). Skeletonema mirabile Grun. (Cl. & M@ll. Diat. No 318) Cape Wankarema. I have seen of this species only a sketch, sent by Mr. Grunow. It has the appearance of a chain of auxospores of some Cheetoceros, but not having seen a specimen I cannot say anything about it. Melosira nummuloides (Lyngb.) Kiitz. — Greenl., Finm., Spitsb., Kara. var. hyperborea Grun. (M. arctica Dickie) Van Heurck. Syn. Pl. LXXXYV, fig. 3—4) Discovery Bay, Novaia Zemlia. M. sulcata (Ehb.) Kiitz. (Paralia suleata Cl.) Finm., Kara. var. siberica Grun. (Van Heurck Syn. Pl. XCI, fig. 22) F. J. 1. var. biseriata Grun. (Van Heurck Syn. 1. c. fig. 23—24) F. J. £. 490 CLEVE, DIATOMS. M. (mediterranea Grun. var.?) gelida Cl. — Surface of the valve covered near the margin with puncta arranged in curved lines crossing each other, about 25 in 0,01 mm. Diam 0,02 —0,os mm. PI. 38, fig. 83 a. b. — Mushroom Point. M. ornata Grun. (Van Heurck Syn. XCI, fig. 19—21) F. J. L. M. Borreri Grev. (Van Heurck Syn. Pl. LXXXV, fig. 5—7) Greenl., Bessel’s Bay. II. Surface-diatoms from the Behring Sea. Dr. Kjellman has collected in the Behring Sea diatoms living on the surface. The gathering contained: Thalassiothrix longissima Cl. & Grun. in great abundance. Coscinodiscus borealis Bail. (A. Schm. Atl. LXIJII, fig. 11). Endictya oceanica Ebb. Chetoceros atlanticus -Cl. Rhizosolenia styliformis Btw. Rh. hebeta Bail. II. Fresh-water diatoms from Japan. In Japan Dr. Kjellman made some gatherings of fresh-water diatoms, interesting because most of the species were perfectly identical with European ones. I have observed the following species, of which the greater part has been determined with the aid of Van Heurck’s synopsis: Amphora affinis Kiitz. / Cymbella cuspidata Kitz. Length 0,092. Breadth 0,024 mm. Strie 10 in the middle, 12 near the ends. C. affinis Kiitz. C. gastroides Kiitz. C. cymbiformis Ebb. C. Cistula Hempr. C. tumida Bréb. Eucyonema cespitosum Kiitz. Epithemia gibba (Ehb.). E. gibberula Kiitz. VEGA-EXPEDITIONENS VETENSKAPLIGA ARBETEN. 491 Ei: Sorex Kiitz. E. Zebra (Ehb.). Anchanthes lanceolata Bréb. A. minutissima var. eryptocephala W. Sm. Cocconets Placentula Ehb. Gomphonema constrictum var. capitatum Ebb. G. gracile Eb. G. angustatum Grun. G. parvulum Kitz. Stauroneis anceps Ehb. Navicula major Kiitz. . viridis Kiitz. Legumen (Ebb.). borealis (Ehb.). Brébissonii Kiitz. var. bicapitata Ldt. Cymbula Donk. lanceolata Kiitz. eryptocephala Kiitz. amphiceros Kiitz. tenella Bréb. dicephala W. Sm. elliptica Kiitz. humilis Donk. cuspidata Kiitz. . ambigua Ebb. . limosa var. ventricosa Donk. N. fasciata Ldt. N. affinis Ebb. N. Pseudobacillum Grun. (Arct. Diat. pag. 45, Pl. II, fig. 52). . N. Pupula (Kiitz.) Grun. N. Seminulum Grun. N. binodis W. Sm. (Brit. D. XVII, fig. 159). Schizonema vulgare Thw. Amphipleura pellucida (Ehb.). Pleurosigma Kiiteingii Grun. (Arct. Diat. pag. 59) Transv. strie 21, longitudinal 26 in 0,01 mm. Syneda Ulna Nitzsch var. S. Acus var. tenuissima Grun. Staurosira brevistriata Grun. St. mesolepta Rabh. Niteschia (Tryblionella) Levidensis W. Sr. var. Victorie Grun. Azz aaaaeezeezeSaaaaaa 492 CLEVE, DIATOMS. N. sigmoidea (Ehb.) N. intermedia Hantzsch. N. Denticula Grun. var. minor, lanceolata, costis abbrevia- tis. A very remarkable variety with coste not reaching half- way across the valve, 6 in 0,01 mm. and 17 strie in 0,01 mm. Pl. 37, fig. 68. It is only on the authority of Mr. Grunow that I have accepted the determination as a variety of N. Denticula. N. Tabellaria Grun. Hanteschia amphioxys var. californica Grun. (A. Diat. pag. 103). Surirella elegans Ehb. S. saxonica Auersw. (A. Schm. Atl. Pl. XXII, fig. 1—2). S. linearis W. Sm. (A. Schm. Atl. Pl. XXIII, fig. 27—33). S. apiculata W. Sm. (A. Schm. Atl. Pl. XXIII, fig. 34—35). Cymatopleura Solea (Bréb.) W. Sm. Cyclotella comta Ehb. Melosira varians Agardh. IV. Diatoms from Labuan. During the stay of the Vega in Labuan near Borneo Dr. Kjellman made some gatherings of marine alge, among which was found a number of diatoms, which I have examined. I have registered the following forms: Amphora ostrearia Bréb. (H. L. Smith Lens II, p. 72, Pl. I, fig. 16. — A. Schmidt Atl. Pl. XXVI, fig. 23? strie not punctate!) This very variable species occurs in many forms, . described as distinct species, as A. vitrea Cl. A. quadrata Bréb. A. elegans Greg. A. membranacea W. Sm. and Roper. A. littoralis Donk. Specimens from Labuan have 12 strie in 0,01 mm., composed of distinct, separate puncta. Length of the valve 0,095 mm. var. Porcellus (A. Porcellus Kitton in A. Schm. Atl. Pl. XXXIX, fig. 15—17. in 0,01 mm., a little more than half of the radius in length, encircling a depressed cen- tral area, which is almost smooth. Margin striate with 18 strie in 0.1 mm, — This beautiful species should perhaps be more correctly arranged in the genus Campylodiscus, where it seems to come near to C. Helianthus, but I think neverthe- less it is most nearly related to Surirella fastuosa. — Pl. 38, fig. 79, °°. Campylodiscus undulatus Grev. (A. Schm. Atl. Pl. XVIII, fig. 11). : decorus Bréb. (A. Schm. Atl. Pl. XIV, fig. 45). Ralfsii W. Sm. (A. Schm. Atl. Pl. XIV, fig. 1). crebrecostatus Grev. (A. Schm. Atl. Pl. XV, fig. 16—17). subangularis Grun. (A. Schm. Atl. Pl. XVIII, fig. 5-6). . densecostatus Cl. — Diam. 0,084 mm. Canaliculi numerous, 6 in 0,01 mm., reaching to the median raphe and interrupted by a circular Faurew, M4 of the radius distant from the mar- gin. — Pl. 38, fig. 76. C. limbatus var. minuta Cl. — Diam. 0,027—0,035 mm. Cana- liculi about 9 in 0,01 mm. — PI. 38, fig. 77. Ba Iii. 33 ee 514 OLEVE, DIATOMS. Rhizosolenia ornithoglossa Ehb.? — Some fragments, probably belonging to this species. Chetoceros coarctatus Laud.? — Some fragments, which seem. to belong to this species. Biddulphia pulchella Gray. B. Tuomeyi Roper (T. M. S. VII, Pl. I, fig. 1—2). B. dubia (Btw.) Cl. (Tricerat. dubium Btw. T. bicorne Cl). Triceratium Favus Ehb. T. cinnamomeum Grev. (T. M. 8. III, Pl. IX, fig. 12). T. Pentacrinus Wallich. T. punctatum Btw. (A. Schm. Atl. Pl. LXXVI, fig. 19—20- T. sculptum Shadb. A. Schm. Atl. 1. ¢. fig. 9—10). Hemidiscus cuneiformis Wallich. Palmeria Hardmaniana Grev. Coscinodiscus africanus Jan. (A. Schm. Atl. Pl. LIX, fig. 24—25). . subtilis Ehb. (A. Schm. Atl. LVII, fig. 13—14). denarius A. Schm. (Atl. Pl. LVII, fig. 20—21). radiatus Ehb. (A. Schm. Atl. Pl. LX, fig. 57). eaxcentricus Ehb. nodulifer A. Schm. (Atl. Pl. LIX, fig. 21). concavus Greg. (Diat. of Cl. Pl. II, fig. 47). . lineatus Ehb. (A. Schm. Atl. Pl. LIX, fig. 26). Podosira maxima (Kg.) Grun. (Arct. Diat. pag. 118). Melosira (Paralia) marina Ehb. Actinoptychus undulatus Ehb. Asteromphalus Arachne Bréb. (A. Schm. Atl. Pl. XXXVITI, fig. 3—4). A. elegans Ralfs (A. Schm. Atl. XXXVIII, fig: 1—2). RARARAR VEG A-EXPEDITIONENS VETENSKAPLIGA ARBEPEN. 515 oS DNB Ow w 20. 21. 22. 23. 24, 25. 26. 27, 28. Explication of the Plates. Pl. 35. Amphora Labuensis Cl. Labuan 199°. Achnanthes pennata Grev. Ceylon 1%°. A. grénlandica Cl. Bessel’s Bay 1%°. Cocconeis arctica Cl. Bessel’s Bay 19°. Mastogloia (acutiuscula var.?) Labuensis Cl. Labuan 19°. M. Kjellmanii Cl. Labuan 19°. M. (baltica var?) Citrus Cl. Labuan 199°. M. acuta Grun. var.? Labuan 19°. M. rhombica Cl. Labuan 14°. Stauroneis pellucida Cl. Cape Wankarema 14°, Amphiprora kryophila Cl. Cape Wankarema !%° a F. V., b. 8. V. A. glacialis Cl. Cape Wankarema !°°. Pleurosigma glaciale Cl. Cape Wankarema a *}°, b structare 79°. P. Clevei Grun. var. siberica Grun. Cape Wankarema 999. Navicula transfuga Grun. Bab-el-Mandeb !?9. nicobarica Grun. Ceylon 19?°. syblyrata Grun. var. Labuan 199°. cruciformis var. brevior Cl. Cape Deschnew (East Cape) 199°. megastauros Cl. Cape Deschnew (East Cape) 149°. Pl. 36. Navicula decurrens (Ehb.) Grun. Cape Deschnew (East Cape) 14°. N. Pinnularia Cl. var interrupta Cl. Cape Wankarema 199°, N. Leudugeri Cl. Ceylon 19°. N. (Rhoikoneis) superba Cl. Cape Wankarema 19°. Both valves of the same frustle. N. (Rhoikoneis) superba var. elliptica Cl. Cape Wankarema 149°. N. (Rhoikoneis) obtusa Cl. Cape Wankarema 1°, N. incudiformis Grun. Cape Wankarema 149°. N. asymmetrica Cl. Cape Wankarema 14°. N. erosa Cl. Cape Wankarema !%°. 516 CLEVE, DIATOMS. 29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39, 40. 41. 42. 43. 44. 45. 46. 47. 49. 50. 61. 52. 53. 54. 55. 56. 57. 58. 59. 60. 61. 62. 63. 64. trigonocephala Cl. Cape Wankarema 19°, incudiformis Grun. var. Cape Wankarema !%°. transitans Cl. Cape Wankarema 14?°. . (transitans Cl. var.) derasa Grun. Cape Wankarema !%°, transitans Cl. type. Cape Wankarema !%°. imperfecta Cl. Cape Wankarema 1%°. retusa Bréb. Cape Wankarema 1%°. detersa Grun. Cape Wankarema 1%. transitans Cl. forma minuta. Cape Deschnew (East Cape) 199°. Pl. 37. Navicula (Rhoikoneis) Bolleana var.? siberica Grun. Cape Wan- karema 1999. N. (Rhoikoneis) Bolleana var. asymmetrica Cl. Cape Wankare- ma 1090, Kariana Grun. var. minor, f. curta. Cape Wankarema 1499. . glacialis Cl. var. Cape Wankarema 1%. . gelida Cl. Cape Wankarema 19°. kryophila Cl. Cape Wankarema 19°. kryokonites Cl. Cape Wankarema 19°. -kryokonites Cl. var. semiperfecta Cl. Cape Wankarema 1000, kryokonites Cl. var. subprotracta Cl. Cape Wankarema 1%°. (kryokonites var.?) Vankareme Cl. Cape Wankarema 1°. Tschuktschorum Cl. Cape Deschnew (East Cape) 199°. subimpressa var. tenuior Cl. Cape Deschnew (East Cape) 1000. . subinflata Grun. Cape Wankarema 1%?°. . Baculus Cl. Cape Wankarema 149°. aphoneis amphiceros Ehb. Labuan 14° a. typical b. form in- termediate between Rh. amph. var. californica and var. cruciata c. intermediate between var. cruciata and pentagona. a. b. Raphoneis quarnerensis Grun. var.? Labuan 199° Trachyspenia australis H. L. Sm. var. elliptica Cl. Labuan !%°. Raphoneis? bilineata Cl. & Grun. Labuan 1°. , R. maculata Cl. Labuan 19°. R.? marginata Cl. & Grun. Labuan 199, Dimerogramma ceylanica Cl. Ceylon 199°. - a. b. Plagiogramma Seychellarum Grun. Labuan !4?9, Sceptroneis intermedia Cl. Ceylon a 39° b 1990, a. b. Plagiogramma interruptum var. adrictica Labuan Grun. 14°, Pl. (caribeeum Cl. var.?) Labuense Cl. Labuan 199°, Pl. tenuistriatum Cl. Labuan 199°, a. b. c. Fragilaria (?) Cylindrus Grun. Cape Wankarema !%9, AAAAAAAAAZAAA VEGA-EXPEDITIONENS VETENSKAPLIGA ARBETEN. 517 65. 66. 67. 68. 69. 70. 71. 72. 73. 74, 75. 76. 77. 78. 79. 80. 81. 82. 83. 84. Nitzschia hybrida var. kryokonites Cl. Cape Wankarema 14°. N. labuensis Cl. Labuan 1°. N. (punctata var?) diluviana Cl. Labuan 199, N. Denticula var. Japan 149°, Pl. 38. Rhizosolenia hebeta Bail. Sea of Behring a. b. d.e. f. 39% c. 199° Nitzschia gelida Cl. & Grun. Cape Wankarema a. 12° b. c 199. N. wankareme Cl. Cape Wankarema 1499. a. b. N. polaris Grun. Cape Wankarema 1°, a. b. N. (Sigma var.?) scabra Cl. Cape Wankarema 199° N. (obtusa var.??) kryophila Cl. Cape Wankarema !%°. N. (?) seriata Cl. Greenland 14°. Campylodiscus densecostatus Cl. Bab-el-Mandeb 599, C. limbatus var. minuta Cl. Bab-el-Mandeb 199° C.? cocconeiformis Grun. Labuan 190°, Surirella orbicularis Cl. Bab-el-Mandeb *2°. a. b. Cerataulus labuensis Cl. Labuan 199°. 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