Diatoms from North-East Greenland. 203 



Navicula Grevillei Ag., CI. Syn., 1, 152; V. H. Trt., Tab. V, fig. 243 

 (Schizonema Grev.). 



Lo с. Otr Cape Amélie (Algæ), 2 sampl.). 

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



Navicula rhombica Greg., Cl. Syn., I, 152; Greg. T. M. S., IV, 

 Tab. V, fig. 1. 



Lo c. Koldewey Isl. (Algæ). 

 Arct. Distr. W. Greenl. 



Navicula scopulorum Bréb., var arctica var. nova. Tab. nost XIII, 

 fig. 10. 



Long. 57 и. Lat. lu. Str. minime 22 in 10//, debilissimis et ægre 

 perpiciendis. 



Valva lineari, inter apices rötundatos et mediam partem leniter 

 contracta. Raphe area distincta hyalina cincta. Striis parallelis, sub 

 apices, qvoad perspicere potui, convergentibus, media in parte valvæ 

 deficientibus fasciamqve latam relinqventibus. Nodulis terminalibus 

 ab apicibus remotis. 



Loc. Koldewej' Isl. (Algæ). 



This form is probably most nearh' allied to Nav. Scop. Bréb var. belgica 

 H. V. H. (cf. Perag. Mar. Diät. d. Fr., Tab. VIII, fig. 27). 



Gomphonema Ag., 1824. 

 Gomphonema exiguum Kütz., var. arcticum Grun., CI. Syn., I, 

 188; V. H. Syn., Tab. XXV, fig. 30 (Gompli. arctic). 

 Loc. OfT Cape Amélie (Algæ), Pack-Ice. 

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



Gomphonema groenlandicum Øst., Øst. Mar. D. Østg., 414; 

 Tab. III, figs. 11-12. 



Loc. Koldewey Isl. (Algæ), Off Germ. L. (Land-Ice), Marg. of the Pack- 

 Ice (3 sampl.). 



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



Gomphonema kamtschaticum Grun., CI. Syn., I, 188; V. H. 

 Syn., Tab. XXV, fig. 29. 



Loc. Danmarks Havn (Algæ), Koldewey Isl. (Algæ, 3 sampl.). 

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



Gomphonema septentrionale Øst., Øst. Mar. Diät. Østg., 414, 

 Tab. Ill, fig. 9. 



Loc. Pack-ice, Marg. of the Pack-ice. 

 Arct. Distr. E. of Greenl. 



Gomphonema septentrionale Ost., var. angustum Øst., Øst. 

 1. с, fig. 10. 



Loc. Pack-ice, Marg. of the Pack-ice. 

 Arct. Distr. E. of Greenl. 



