TEOA-EXPEDITIOSENa VET ENSKAPLIG A ABBBTEN. 



481 



in the middle. Striae very fine. Length 0,o75 mm. Breadth 

 0,006 mm. — PI. 38, fig. 72. — F. J. L., Cape Wankarema. 



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

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

 puncta and 28 — 30 strise in 0,oi mm. Length O.is mm. Breadth 

 0,009 mm.). 



N. vitrea Norm. (Van Heurck Syn. PI. LXVII, fig. 10) Spitsb. 



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



In the Wankarema gathering occurs a variety of N. vitrea 

 0,12 mm. in length 0,006 mm. in breadth with 8—10 puncta 

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

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

 0,01 mm. 



N. frigida Grun. (A. Diat. pag. 94, PI. V, fig. 101) Greenl. 

 {Discovery Bay), Kara. 



Sectio: Lanceolatce. 



N. lanceolata var. pygmcea CI. — Lanceolate, length 0,045 mm. 

 Breadth 0,oo6 mm. Puncta 12 in 0,oi mm. Strise very fine. — 

 Cape Wankarema. 



Seems to connect N. lanceolata with N. acicularis. 



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



Sectio: NitsschieUa. 



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

 5) Finm., Spitsb., Kara. 



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

 Cape Wankarema. 



Hantsschia ampliioxys (Ehb.) Grun. — Kara (Fresh-water 



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



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

 Grun. in Van Heurck Syn. PI. LXII, fig. 16) F. J. L. 



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

 PI. VI, fig. 110) Kara. 



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



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

 —15) Greenl. (Davis Strait). 



9. Surirellae. 



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

 31, PI. VIII, fig. 59) Finm. 



S. fastuosa var. lepida A. Schm. (Atl. PI. IV, fig. 7) Finm. 

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



JBd III. 31 



