Diatoms from North-East Greenland. 241 



Sli'iis radianlibus, sub apices leniter convergentibus, media in valva 

 spatiatis. 



Loc. Dove Bugt. 



I think this form may be a variety of Xav. gracilis, perhaps most nearly 

 allied to Nav. grac. var. schizonemoides figured in V. H. Syn., Tab. XV, fig. 37 

 (the second figure). 



Navicula lanceolata (Ag.?) Kutz, CI. Syn., II, 21; V. H. Trt., 

 Tab. Ill, fig. 139. 



Loc. Off Cape Amélie (Algæ), Hvalrosodde, Vester Elv. 



Not before recorded from Arctic regions. Several other records. 



Navicula lanceolata var. lenella A. S., A. S. Atl., Tab. XLVII, 

 figs. 45—46. 



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



Not before recorded from Arctic regions. Other records, Sweden, Loka 

 (Cl. 1. с). 



Navicula Placentula Ehr., Cl. Syn., II, 23; V. H. Trt., Tab. III, 

 fig. 135 (Nav. Gastrum Placentul.). 



Loc. Off" Cape Amélie (Algæ), Marg. of the Pack-ice (2 sampl.). 

 Ar ct. Di st г. Yenissey. 



Navicula radiosa Kütz., Gl. Syn., II, 17; V. H. Trt., Tab. III, 

 fig. 112. 



Loc. Hvalrosodde. 



A ГС t. Distr. \V. Greenl., E. Greenl., Spb., B. VA. 



Navicula rhyncocephala Kutz., CI. Syn., II, 15; V. H. Trt., 

 Tab. III, fig. 119. 



Loc. Otf Cape Amélie (Algæ, 2 sampl.). 

 Arct. Distr. В. El. 



Navicula viridula Kütz. var. slesuicensis Grün., Cl. Syn., II, 15; 

 V. H. Trt., Tab. m, fig. 118. 

 Loc. Dove Bugt. 

 Arct. Distr. W. Greenl., E. Greenl. 



Navicula sp. Tab. nost XIV, fig. 9. 



Long. 21 /^. Lat. 5,4 /i. Striis inconspicuis. 



Valva lanceolata apicibus capitatis. Raphe distincta. 



Loc. Dove Bugt. 



This small form shows onh' ver\' few, if any, distinct characters. I 

 think I have seen indications of a striation which, at least in the middle of 

 the valve, seemed to me to be radiate, but I am not quite certain; therefore I 

 do not feel justified in recording it as a new species. 



Naviculæ pimctatæ CI., 1895. 



Navicula pusilla W. Sm. var. capitata var. nova. Tab. nost. XIV, 

 fig. 10. 



Х1ЛП. 19 



