VEG A-EX PEDITIONEXS V ET E N S K A P L I G A ARBETEN. 



473 



N. Jcnjophila CI. — Elliptic oblong or elliptic with parallel 

 sides. StrioQ coarse, costate, about 8 in 0,oi mm., interrupted 

 by large areas on both sides of the median line, over which 

 areas the faint continuations of the stride are visible. Length 

 0,05. Br. 0,018 mm. — PL 37, fig. 43. — Cape Wankarema. 



N. (hryophUa var.?) (jelida CI. — Elliptic. Stride short, 

 marginal, 9 in 0,oi mm., costate, separated from very short strife 

 on both sides of the median line by large areas, over which 

 traces of the stride 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-ampliiprora. 



N. arctiea CI. (K. Sv. Vet. Ak. Handl. XVIII, No 5, pag. 

 3) Finm., Kara (Matotschkin). 



Sectio: Comphxce. 



N. ( Schisonema) GreviUei Ag. (Grun. A. Diat. pag. 42. Nav- 

 Libellus Greg. N. rhombica Greg. Libellus Grevillei CI. D. of 

 the A. S. pag. 18) Greenl. (BessePs 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 stride in 0,oi mm. 



N. ( ScJdzonema) comoides Grev. (Van Heurck Syn. PI. XVI, 

 fig. 3) Cape Deschnew (East Cape). 



N. compJancda Grun. (Amph. complanata Grun. A. Schm. 

 Atl. PI. XXVI, fig. 45) Finm., Kara. 



Sectio : Minididce. 



N. crassirostris Grun. (A. Diat. pag. 45, PI. Ill, fig. 57) 

 Kara. 



var. macisoensis Grun. (1. c.) Finm. 



N. hryokondes CI. Elliptic, with obtuse ends. Striaa paral- 

 lel, 22 in 0,01 mm., absent or obsolete in the middle of the 

 valve. Length 0,034 mm. Breadth O,oii mm. — PI. 37, fig. 44. 



— Cape Wankarema. 



var. suhpfotracta CI. Rhombic with produced, subcapitate 

 ends, stria3 22 in 0,oi mm. Length 0,033 mm. Breadth 0,oo7 

 mm. — PL 32, fig. 46. — Cape V/ankarema. 



var. semiperfecta CI. Stria) 24 in 0,oi 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 37, fig. 45. — Cape Wankarema. 



N. (kryoJconites var.?) tvanharemce CI. Elongate lanceolate. 

 Median line straight, central nodule small, terminal nodules 

 near the ends. Stride absent from the middle of the valve, 



