Diatoms from North-East Greenland. 203 



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

 (Schizonema Grev.). 



T. o c. Off 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, öl u. Lat. lu. Str. minime 22 in 10 /i, debilissimis et ægre 

 perpiciendis. 



Valva lineari, inter apices rotundatos et mediam partern leniter 



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



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



deficientibus fasciamqve latam relinqventibus. Nodulis terminalibus 



ab apicibus remotis. 



Lo c. Koldewey Isl. (Algæ). 



This form is probablv most nearly allied to Nav. Scop. Bréb var. belgica 

 H.V. H. (cf. Perag. Mar. Diat. d. Fr., Tab. VIII, flg. 27). 



Gomphonema Ag., 1824. 

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

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

 Lo c. Off Cape Amélie (Algæ), Pack-Ice. 

 Arct. Distr. Greenl., PZast 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 Ilavn (Algæ), Koldewey Isl. (Algæ, 3 sampl.). 

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



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

 Tab. III, fig. 9. 



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

 Arct. Distr. E. of Greenl. 



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

 1. c, fig. 10. 



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

 Arct. Distr. E. of Greenl. 



