478 



CLEVE, ^DIATOMS. 



Length 0,o7 mm. Breadth 0,oi5 mm. — Cape Wankarema. 



Perhaps a variety of the following. 



A. (Ainiihitropis?) striolata Grun. (A. Diat. pag. 62, PI. IV, 

 fig. 81) Kara. 



A. (Amphitropis?) Imriana Grun. (A. Diat. pag. 61, PL IV, 

 fig. 82) Kara. 



A. (AmpJiitropis) deciissata Grun. var. septentrionalis Grun. 

 (A. Diat. pag. 63, PI. V, fig. 87) Finm., Cape Wankarema. 



Specimens from Wankarema are very large, 0,i4 — 0,i8 mm. in 

 length, and have 20 — 22 stria) on the valve. Median line sigmoid. 



7. AmphipleureaB. 



Berlieleya JDiUivynii Grun. (Van Heurck Syn. PL XVI, fig. 

 15) Sj)itsb., Kara, Cape Deschnew (East Cape) (strite 24 in 0,oi mm). 



8. Nitzschieae. 



Sectio : Tryhllonella. 



N. TryhlionelJa Hantzsch. (Grun. A. Diat. pag. 69) var, 

 Victorice Grun. — Kara. 



var. levidensis W. Sm. — Finm., Kara. 



N. navlcularis (Breb.) 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. (?) seriata CI. N. Sp. — Fusiform with gradually attenua- 

 ted ends. Puncta indistinct. Stria? 16 — 18 in 0,oi mm. per- 

 vious. Frustules coherent in long bands. Length 0,o9 — 0,ii 

 mm. Breadth 0,oo8 mm. — PL 38, fig. 75. — Greenland, Tindin- 

 gen (N. O. Hoist). 



I am very uncertain as to the exact position of this dia- 

 tom, whose nearest allies seem to be N. ? (Homoeoclad'ta) pungens 

 Grun. Mpt. (CI. & Moll. Diat. No 307) from Japan, also the 

 Fragilaria (? ) Cylindrus Grun. Mpt. 



Sectio : Panduriformes. 



N. xmnduriformis Greg. var. delicatida Grun. (A. Diat. pag. 

 71, PL V, fig 92) Finm., Spitsb. 



N. constricta Kiitz. In the Diat. of the Arctic Sea I 

 have indicated this species as oc^-urring near Spitsbergen, but 

 I cannot be sure of tlie correctness of the determination, not 

 having found it afterwards. 



