VEGA-EXPEDITIONENS VETENSKAPLIffA ARBETEN. 



479 



Sectio: Apiculatce. 



N. marginulata Grun. a. genuina Grun. (A. Diat. pag. 72, 

 PI. V, fig. 93) Kara (Matotschkin). 



var. minuta Grun. (1. c.) Cape Deschnew (East Cape) (length 

 0,045 mm. puncta 12 and strife 24 in 0,oi mm.) Greenl. (Mushroom 

 Point). 



N. apiculata (Greg.) Grun. (A. Diat. pag. 73) Greenl., Finm. 



Sectio: Dtibice. 



N. dubia W. Sip. (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 striae in 0,oi mm. 



N. WanJcaremce CI. N. Sp. — Keel not very eccentric ; carinal 

 puncta 5 — 7 in 0,oi mm. absent in the middle, where there is an 

 indication of a central nodule. Strise very fine, about 30 in 0,oi 

 mm. Length 0,i5 — 0,i7 mm. — PL 38, fig. 71. — Cape Wankarema. 



Sectio: Bilobatce. 



N. hylrida Grun. (A. Diat. pag. 79) Spitsb., Finm., Kara. 



var. kryoTconites CI. — Length 0,i3. Carinal puncta 9 in 0,oi 

 mm. Strise very fine, about 30 in 0,oi mm. Keel not very 

 eccentric. Valve slightly constricted in the middle. — PI. 38, 

 — fig. 65. Cape Wankarema. 



var.? pelliicida Grun. (A. Diat. pag. 80, PI. V, fig. 96) Finm. 



N. Mitchelliana Greenl. (Grun. A. Diat. pag. 80, PI. V, fig. 

 97) Finm., Spitsb., Kara. 



Sectio : Pseudo-ampliiprora. 



N. Amphiprora Grun. (A. Diat. pag. 81. Amphipr. Nitz- 

 schioides CI. D. of A. S. pag. 20, PI. IV, fig. 18) Greenl., 

 Spitsb., Cape Deschnew (East Cape). 



Sectio: Insignes. 



N. insignes var. arctica Grun. (A. D. pag. 84) Greenl., Finm., 

 Spitsb., Kara (Matotschkin). 



var.? marginifera Grun. (A. Diat. pag. 84. PI. VI, fig. 105) Finm. 



Sectio: Bacillaria. 



N. socialis Greg. (Van Heurck Syn. PI. LXI, fig. 8) Greenl., 

 Finm., Kara (Matotschkin). 



var. kariana Grun. (A. Diat. pag. 85, PI. VI, fig. 108) Greenl. 

 (Davis strait), Kara. 



var. haltica Grun. (I. c. fig. 107) Kara, Cape Wankarema. 



N. paradoxa (Gmel) Grun. (Van Heurck Syn. PI. LXI, fig. 

 6) Kara. 



Sectio: Vivaces. 



N. (vivax var.?) hyperborea Grun. (A. D. pag. 86, PI. V. fig. 

 104) Kara. 



