TEOA-EXPEBITIOKESS VET ENSK APLI a A ABBETEN. , ^^^ 



A specimen from Cape Deschnew (East Cape) lias 21 striae 

 in 0,01 mm. in the middle and 23 near the ends. Lenght 0,035 

 mm. Br. 0,oo5 mm. 



N. latefasciata Grun. (A. Diat. PL I, fig. 21) Greenl, Mush- 

 room Point, Kara, Cape Deschnew. (East Cape). 



Specimens from Cape Deschnew (East Cape) have not so 

 strongly interrupted strise as specimens from Kara. 



N. gronlandica CI. (K. Sv. Vet. Ak. Handl. 18 No 5, pag. 

 7, PI. I, fig. 13) Davis strait. 



Sectio: Palpebrales. 



N. palpebraUs Br^b. var. Davis Strait. — Length 0,o45 mm. 

 Breadth 0,oi3 mm. Striee 10 in 0,oi mm. costate, scarcely 

 punctate. 



var. minor Grun. (A. Diat. pag. 30, PI. I, fig. 23) Finm. 



A variety from Spitsbergen has 16 striae in 0,oi mm. Length 

 0,04 mm. Breadth 0,oo8 mm. N. minor Greg. 



N. semiplena (Grev.) Donk (Brit. Diat. PI. IV, fig. 5) Finm., 

 Spitsb. (Length 0,065 mm. Breadth 0,ooi mm. Strise 10 in 

 ■0,01 mm.). 



N. solida CI. (A. Diat. pag. 13, PI. I, fig. 24) Finm. 



Sectio : Amphishance. 



N. brevis Greg. (Diat. of CI. pag. 478, PI. IX, fig. 4, A. 

 Schm. N. Sea Diat. PI. II, fig. 15) Greenl., Davis Strait, Finm., 

 Spitsb., Cape Deschnew (East Cape). 



var. vexans Gruu. (A. Schm. N. Sea Diat. PI. II, fig. 14) 

 Finm., Matotschkin, Kara. 



var. distonla Grun. (A. Diat. pag. 30, PI. I fig. 25 — 26) Finm. 



N. amphishmna var. fuscata (Schum) Grun. (A. Diat. pag. 

 31, PI. I, fig. 27) Kara. 



~N. subsalina Donk. (Brit. Diat. PI. IV, fig. 2, N. Fenzlii 

 ■Grun. N. lacustris Grun.) Greenl., Spitsb., Finm. 



Sectio: Badiosce. 



N. flanatica Grun. has been indicated in CI. Diat. of the A. 

 S. 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, PI. I, fig. 28) 

 €ape Deschnew (East Cape). 



N. digito-radiata Greg. (A. Schm. N. Sea Diat. PI. Ill, fig. 

 4) Greenl., Mushroom Point, Finm., Spitsb., Kara. 



nd in. 30 



