VEGA-EXPEDITIONENS VETENSKAPLIGA ARBETEN. 479 
Sectio: Apiculate. 
N. marginulata Grun. a. gemina Grun. (ÅA. Diat. pag. 72, 
P1. V, fig. 93) Kara (Matotschkin). 
var. minuta Grun. (1. ec.) Cape Deschnew (East Cape) (length 
0,045 mm. puneta 12 and strixe 24in 0,01 mm.) Greenl. (Mushroom 
Point). 
N. apiculata (Greg.) Grun. (A. Diat. pag. 73) Greenl., Finm. 
Sectio: Dubice. 
N. dubia W. Sm. (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 strizxe in 0,01 mm. 
N. Wankareme Ol. N. Sp. — Keel not very eccentric; carinal 
puncta 5—7 in 0,01 mm. absent in the middle, where there is an 
indieation of a central nodule. Strize very fine, about 30 in 0,01 
mm. Length 0,15—0,17 mm. — PI. 38, fig. 71. — Cape Wankarema. 
Sectio: Bilobate. 
N. hybrida Grun. (A. Diat. pag. 79) Spitsb., Finm., Kara. 
var. kryokonites Ol. — Length 0,13. Carinal puneta 9 in 0,01 
mm. Strie very fine, about 30 in 0,01 mm. Keel not very 
eccentric. Valve slightly constriected in the middle. — PI. 38, 
— fig. 65. Cape Wankarema. 
var.? pellucida Grun. (A. Diat. pag. 80, P1. V, fig. 96) Finm. 
N. Mitehelliana Greenl. (Grun. A. Diat. pag. 80, Pl. V, fig. 
97) Finm., Spitsb., Kara. 
Sectio: Pseudo-ampliprora. 
N. Ampluaprora Grun. (A. Diat. pag. 81. Ampbipr. Nitz- 
sehioides CI. D. of A. S. pag. 20, Pl. 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. P1. VI, fig. 105) Finm. 
Sectio: Bacillaria. 
N. socialis Greg. (Van Heurck Syn. Pl. LXI, fig. 8) Greenl., 
Finm., Kara (Matotschkin). 
var. kariana Grun. (A. Diat. pag. 85, P1. VI, fig. 108) Greenl. 
(Davis strait), Kara. 
var. baltica Grun. (1. ce. fig. 107) Kara, Cape Wankarema. 
N. paradoxa (Gmel) Grun. (Van Heurck Syn. P1. LXI, fig. 
6) Kara. 
Sectio: Vivaces. . 
N. (vivax' var.?) hyperborea Grun. (A. D. pag. 86, Pl. V. fig. 
104) Kara. 
