Diatoms from North-East Greenland. 251 



think it may be a Synedra, not a Fragilavia. A. Cleve (Beitr. z. Fl. d. Bär. 

 Ins., 17, fig. 10) describes and figures a Synedra Vaiicheria Kütz. var. per- 

 miniita Grun., which may be a smaller and non-capitate form of the present 

 species. 



Fragilaria Lyngb. 



Fragilaria construens (Ehr.) Grun.; V. H. Trt., 325, Tab. XI, 

 fig. 450. 



Loc. Hvalrosodde. 



Arct. Distr. W. (ireenl., B. El. 



Fragilaria (nmiabilis (W. Sm.) Grun. var.?) elliptica Schumann 



de Toni Syll., 687 (Frag, ellipt.); V. H. Syn., Tab. XLV, fig. 15. 



Loc. Hvalrosodde. 



Not before recorded from Arctic regions. 



Diatoma De Cand., 1805. 

 Diatoma hiemale (Lyngb.) Kütz. var. mesodon Kütz. V. H. 

 Trt., 350, Tab. XI, fig. 471. 



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

 Arct. Distr. W. Greenl. 



Tabellaria Ehr., 1839. 

 Tabellaria flocculosa (Roth.) Kütz. V. H. Trt. , 357 , Tab. XI, 

 fig. 478. 



Loc. Hvalrosodde, Dove Bugt, Vester Elv (7 sampl.). 

 Arct. Distr. \Y. Greenl., E. Greenl., Spb., B. EL, J. M. 



Centri cæ. 



Melosira Ag. 



Melosira varians Ag. V. H. Trt., Tab. XVIII, fig. 611. 



Loc. Danmarks Havn. 



Not before recorded from Arctic regions. Several other records. 



Cyclotella Kütz., 1833. 



Cyclotella antiqva W. Sm. V. H. Trt., 446, Tab. XXII, fig. 652. 



Loc. Hvalrosodde (2 sampl.). 



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



Stephanodiscus (Ehr., 1845) Grun., 1880. 



Stephanodiscus Astræa (Ehr.) Grun. var. spiimlosus Grun., 



Grun., Fz. Js. Ld., 49, Tab. V., fig. 2. 



Loc. Danmarks Havn (Algæ). 

 Arct. Distr. E. Greenl., Fz. .Ts. Ld. 



