TEGA-EypEniTfOyENf: V ETENSK APLIG A AltBKTEH. 



473 



'N. kryophila CI. — Elliptic oblong or elliptic with parallel 

 sides. Strise coars6, costate, about 8_in 0,oi mid., interrupted 

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

 areas the faint continuations of the strise are visible. Length 

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



N. (kryophila var.?) gelida CI. — Elliptic. Strise short, 

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

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

 traces of the striae are visible. Central nodule surrounded by 

 a circular area. Length 0,o8 mm. Breadth 0,o4 mm. — PI. 37, 

 fig. 42. — Cape Wankarema. 



Sectio : Pseudo-amphiprora. 



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

 3) Finm., Kara (Matotschkin). 



Sectio: Complexce. 



N. (ScMsonema) Grevillei Ag. (Grun. A. Diat. pag. 42. Nav. 

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

 the A. S. pag. 18) Greenl. (Bessel's Bay), Finm., Spitsb. 



The largest specimen I have seen from Greenland measures 

 0,125 mm. in length and 0,o24 mm. in breadth and has in 

 the middle 15 strise in 0,oi mm. 



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: Minutidce. 



N. crassirostris Grun. (A. Diat. pag. 45, PL III, fig. 57) 

 Kara. 



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



N. Jcrpokoniies CL Elliptic, with obtuse ends. Strise paral- 

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

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



— Cape Wankarema. 



var. subprotracta CL Rhombic with produced, subcapitate 

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

 mm. — PL 32, fig. 46. — Cape Wankarema. 



var. semiperfecta CL Striaa 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. (hryokonites var.?) wankaremce CL Elongate lanceolate. 

 Median line straight, central nodule small, terminal nodules 

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



