VEGA-EXPEDITION ENS VET ENS K A I'L l G A AUBETEN. ^05 



A specimen from Cape Descbnew (East Cape) lias 21 stri« 

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

 mm. Br. 0,oo5 n)m. 



N. Jafefasckda Grun. (A. Diat. PI. I, fig. 21) Greenl., Mush- 

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



Specimens from Cape Deschnew (East Cape) have not so 

 strongly interrupted stria) as specimens from Kara. 



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

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



Sectio: Palpebrales. 



N. palpebralis Breb. var. Davis Strait. — Length 0,045 mm. 

 Breadth 0,oi3 mm. Strice 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 stride inO,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,og5 mm. Breadth 0,ooi mm. Striee 10 in 

 0,01 mm.). 



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



Sectio : Ampliisbcenre. 



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

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

 Spitsb., Cape Deschnew (East Cape). 



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

 Finm., Matotschkin, Kara. 



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



N. amphislja'na var. fiiscata (Schum) Grun. (A. Diat. pag. 

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



N. suhsalina Donk. (Brit. Diat. PI. IV, fig. 2, N. Fenslii 

 Grun. N. Jactistris 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 m}^ 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) 

 Cap.e Deschnew (East Cape). 



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

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



Bd III. 30 



