218 Ehnst ØSTULI'. 



Bncillaria Grün., 1880. 

 Nitzschia paradoxa (Gnsel.) Gnin. V. II. Tri. ;592, Tal). XVI, 

 flg. 518. 



Loc. Koldcwcy Isl. (Al^æ). 

 .Viel. Di sir. l^asl .\rcl. S. 



Nitzschia socialis Greg. var. kariana Grün., Cl. & Grün. A. D. 

 85, Tab. VI, fig. 108. 



Loc. 011' Cape Amélie (Algæ, 2 sampl), Danmarks Havn (Algæ). 

 Arct. Distr. Easl Ard. S. 



Spathiilatæ Grun., 1880. 

 Nitzschia angularis W. Sm. V. H. Tri. 393, Tab. XVI, fig. 521. 

 Loc. OIV Cape Amelie (Algæ), Danmarks Havn (Algæ). 

 .\rc'l. Distr. Greenl., E. of Greenl., East Arct. S. 

 Nitzschia angularis var. borealis Grun., Cl. & Grun. A.D. 89, 

 Tab. V, fig. 99. 



Loc. on" Cape Amélie (Algæ), Koldewey Isl. (Algæ). 



Arct. Distr. Greenl., East Arct. S. 



Nitzschia distans Greg. V. H. Tri. 394, Tab. XXXIII, fig. 878. 



Loc. Oir Cape Amélie (Algæ). 



Arct. Distr. W. Greenl., East Arct. S. 



Sigmoideæ Grun., 1880. 



Nitzschia Brébissonii W. Sm., var. borealis Grun., Cl. Baff. B. 

 21, Tab. I, figs. 28-32; Øst. Mar. D. Østg., Tab. VII, fig. 80 (Nitz. 

 socialis septentrionalis). 



Loc. Danmarks Havn (Algæ). 



Arct. Distr. Davis Strait, E. of Greenl., East Arct. S. 



Nitzschia lævissima Grun., Grun. Fz. .Is. Ld., 54, Tab. I, figs. 

 65— G6. 



Loc. OO" Cape Amélie (Algæ), Marg. of the Pack-ice (4 sampl.). 



Arct. Distr. E. of Greenl., East Arct. S. 



Sigmata Grun., 1880. 



Nitzschia scabra Cl., Cl. Vega Exp. 480, Tab. XXXVIII, fig. 73. 



Loc. Marg. of the Pack-ice. 



Arct. Distr. W. Greenl., E. of Greenl., East Arct. S. 



Nitzschia Sigma W. Sm. V. H. TrL 396, Tab. XVI, fig. 531. 



Loc. Oir Cape Amélie (Algæ). 



Arct. Distr. W. Greenl., East Arct. S. 



Nitzschia Sigma W. Sm., var robusta var. nova. Tab. nost XIII, 

 fig. 26. 



Long. 270/i. Lat. 10/i. Punct. carinal. 2—3 in 10/i, Str. 16 — 17 

 in 10 Uy distinte punctatis, carena admodum excentrica. Striis care- 

 nam versus obliterantibus. 



