Diatoms from North-East Greenland. 213 



Loc. Danmarks Havn (Algæ, 2 sampl.), Koldewey Isl. (Algæ). 

 A ret. Distr. Greenl., East Arct. S. 



Cocconeis Scutellum Ehr., var. minuiissima Grun., Griin. Fz. 

 Js. L., Tab. I, fig. 1. 



Loc. Off" Cape Amelie (Algæ). 

 Arct. Distr. Franz-Josef Land. 



Cocconeis Scutellum Ehr., var. californica Grun., A. S. All., Tab. 

 CXCI, figs. 40-43. 



Loc. Danmarks Havn (Algæ), Oft' Cape Bismarck (Algæ), Koldewey Isl. 

 (Algæ). 



Hitherto recorded only from California and Kamtschatka. 



Subg. Eucocconeis CI., 1895 pro. gen. 



Cocconeis dirupta Greg. var. decipiens CI., CI. Syn., II, 175; 



Cl. Arct. S., Tab. I, fig. G (Cocc. decip.) & Tab. II, fig. 11 a (Coco, arctica). 



Loc. Off Cape Amélie (Algæ), Danmarks Havn (Algæ), Koldewey Isl. 

 (Algæ). 



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



Cocconeis pseudomarginata Greg., CL Syn., II, 178; V. H. Trt., 

 Tab. XXIX, fig. 824. 



Loc. Danmarks Havn (Algæ, 2 sampl.). 



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



Cocconeis septentrionalis Grun., Cl. Syn., II, 174; Grun. Fz. 

 Js. L., Tab. I, lig. 2. 



Loc. Olf Cape Amélie (Algæ, 4 sampl.), Danmarks Havn (Algæ, 2 sampl.), 

 Koldewey Isl. (Algæ, 2 sampl.), Marg. of the Pack-ice. 



Hitherto recorded only from Franz-Josef Land (Assistance Bay). 



Subg. Disconeis CI., 1895 pro. gen. 

 Cocconeis pinnata Greg., CI. Syn., II, 181 ; V. H. Trt., Tab. XXIX, 

 fig. 818. 



Loc. Danmarks Havn (Algæ), Koldewey Isl. (Algæ, 2 sampl.). 

 Arct. Distr. East Arct. S. 



Cocconeis pinnata var. arctica var. nova. Tab. nost. XIII, fig. 13. 



Long. 24 /i. Lai. 11 fi. Costis 5,5 in 10/^ utrisqve in valvis, du- 

 plice serie punctorum alternantium interpositis. Valva elliptica 

 apicibus paululum attenuatis. Epilheca: Area apicali satis angusta. 

 Hypotheca : Raphe area angusta hyalina cincta. Costis utrisqA'e in 

 valvis subradiantibus. 



Loc. Danmarks Havn (Algæ). 



This variety differs from the main species in its somewhat attenuated 

 apices and its narrow apical area. 



Subg. Pleuroneis, CI., 1895 pro. gen. 

 Cocconeis costata Greg., CI. Syn., II, 182; V. H. Trt., Tab. XXIX, 

 fig. 816. 



