TEG A- EXP EDIT ION ENS VETENS K A PL IG A ARBETEN. 



481 



in the middle. Stria) very fine. Length 0,075 mm. Breadth 

 0,006 mm. — PL 38, fig. 72. — F. J. L., Cape Warikurema. 



N. linearis var. tenuis Grun. (xV. D. pag. 93) Kara, Cape 

 Wankarema. (Specimen from the latter locality have 11 — 12 

 puncta and 28 — 30 striie in 0,oi mm. Length 0,i3 mm. Breadth 

 0,009 mm.). 



N. vitrea Norm. (Van Heurck Syn. PL LXMI, fig. 10) Spitsb. 



var. finmarchica Grun. (A. D. pag. 94, PL VI, fig. 106) Finm. 



In the Wankarema gathering occurs a variety of N. vitrea 

 0,12 mm. in length 0,oo6 mm. in breadth with 8—10 puncta 

 in 0,01 mm. and very fine striDC. In the Discovery Bay gather- 

 ing occurs another variety with 8 — 9 puncta and 25 striae in 

 0,01 mm. 



N. friyida Grun. (A. Diat. pag. 94, PL V, fig. 101) GreenL 

 (Discovery Bay), Kara. 



Sectio : Lanceolata^. 



N. Janceolata var. pygmcea CI. — Lanceolate, length 0,04.5 mm. 

 Breadth 0,oo6 mm. Puncta 12 in 0,oi mm. vStrise very tine. — 

 Cape Wankarema. 



Seems to connect N. lanceolata with N. acicularis. 



N. ovalis Arn. (Grun. A. Diat. pag. 95, PL V, fig. 103) Kara. 



Sectio: NitzschieJJa. 



N. Closterium (Ehb.) W. Sm. (Van Heurck Syn. PL LXX fig. 

 5) Finm., Spitsb., Kara. 



N. acicularis W. Sm. (Van Heurck Syn. 1. c. fig. 6) Kara, 

 Cape Wankarema. 



Hantzschia amphioxys (Ehb.) Grun. — Kara (Fresh-water 



species), var. vivax Grun. (A. Diat. pag. 103) Kara. 



H. Weipreclitii Grun. (A. Diat. pag. 104, Nitzschia Weipr. 

 Grun. in Van Heurck Syn. PL LXIi; fig. 16) F. J. L. 



H. virgata Roper var.? horeaJis Grun. (A. Diat. pag. 104, 

 PL VI, fig! 110) Kara. 



var.? kariana CI. & Grun. (1. c. fig. 109) Kara. 



H. marina (Donk.) Grun. (Van Heurck Syn. PL LVI, fig. 14 

 — 15) GreenL (Davis Strait). 



9. Surirellae. 



Suriretla Smithii Ralfs (S. constricta W. Sm. Syn. I, pag. 

 31, PL VIII, fig. 59) Finm. 



8. fastuosa var. lejnda A. Schm. (Atl. PL IV, fig. 7) Finm. 

 S. Gemma Ehb. (Van Heurck Syn. PL LXXIV, fig. 1) Spitsb. 

 Bd III. 31 



