478 CLEVE, DIATOMS: 
Length 0,07 mm. Breadth 0,0135 mm. — Cape Wankarema. 
Perhaps a variety of the following. 
A. (Amplutropis?) striolata Grun. (A. Diat. pag. 62, Pl. IV, 
fig. 81) Kara. 
A. (Amplitropis?) kariana Grun. (A. Diat. pag. 61, Pl. IV, 
fig. 82) Kara. 
A. (Amphitropis) decussata Grun. var. septentrionalis Grun. 
(A. Diat. pag. 63, Pl. V, fig. 87) Finm., Cape Wankarema. 
Specimens from Wankarema are very large, 0,14—0,18 mm. in 
length, and have 20—22 strise on the valve. Median line sigmoid. 
7. Amphipleure2&. 
Berkeleya Dillwynii Grun. (Van Heurck Syn. Pl. XVI, fig. 
15) Spitsb., Kara, Cape Deschnew (East Cape) (strize 24 in 0,01 mm). 
8. Nitzschiez. 
Sectio: Tryblionella. 
N. Tryblionella Hantzsch. (Grun. A. Diat. pag. 69) var. 
Victorie Grun. — Kara. 
var. levidensis W. Sm. — Finm., Kara. 
N. navicularis (Bréb.) Grun. (Trybl. marginata Sm.) Spitsb. 
— I have indicated this species in the D. of the A. S. as an 
inhabitant of the Arctic Sea, but not having afterwards found 
it, I am uncertain as to the' exactness of the determination. 
N. (2) seriata Cl. N. Sp. — Fusiform with gradually attenua- 
ted ends. Puncta indistincet. Strie 16—18 in 0,01 mm. per- 
vious. Frustules coherent in long bands. Length 0,09—0,;11 
mm. Breadth 0,008 mm. — Pl. 38, fig. 75. — Greenland, 'Tindin- 
gen (N. O. Holst). 
I am very uncertain as to the exact position of this dia- 
tom, whose nearest allies seem to be N.? (Homoeocladia) pungens 
Grun. Mpt. (Cl. & Möll. Diat. No 307) from Japan, also the 
Fragilaria (2) Cylindrus Grun. Mpt. 
Sectio: Panduriformes. 
N. panduriformis Greg. var. delicatula Grun. (A. Diat. pag. 
vil; PI VS f02) mmm ISpitsb. 
N-. constrieta Kätz. In the Diat. of the Arctic Sea I 
have indicated this species as occurring near Spitsbergen, but 
I cannot be sure of the correctness of the determination, not 
having found it afterwards. 
