Diatoms from North-East Greenland. 209 



I quite agree with Dr. H. Heiden when he says (in the explanation of 

 the Table in A. S. Atl. quoted above): "Zu Stenoneis darf diese Species, wie 

 Cleve es tut, nicht gestellt werden." 



Navicula glacialis Gl., Gl. Syn., II, 40; Tab. I, fig. 28. 



Lo c. Off Cape Amélie (Algæ), Koldewey Isl. (Algæ). 



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



Navicula glacialis, var. septentr ionalis Gl., A. S. Atl., Tab. VI, 

 fig. 37. 



Lo c. Koldewey Isl. (Algæ). 



Arct. Distr. (ireenl.. East Arct. S. 



Navicula punctulata W. Sm., var. finmarchica Grun., GI. Syn., 

 II, 47; GI. & Grun. A.D., Tab. II, fig. 49 & Øst Mar. D. Østg., Tab. VI, 



fig. 69. 



Lo c. Off Cape Amelie (Algæ, 4 sampl.), Koldewey Isl. (Algæ, 2 sampl.). 

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



Naviculæ lyratæ GI., 1895. 



Navicula Lyra Ehr., var. arctica var. nova. Tab. nost XIII, fig. 9. 



Long. 46 /i. Lal. 21,«. Str. 9 — 10 in 10//, delicatissime transverse 

 lineatis. 



Valva apices versus cuneata, media in parte marginibus fere 

 parallelis. Media parte siilcorum , Lyram effingentium , stria sicut 

 nebulosa instructa. 



Lo c. Koldewey Isl. (Algæ). 



I think that this variety comes nearest to Nav. Lyra var. atlantica A. S. 



Navicula pygmæaKutz, Gl. Syn., II, 65; V. H. Trt., Tab. IV, 164. 



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



Arct. Distr. East. Arct. S. 



Navicula spectabilis Greg., GI. Syn., II, 60; A. S. Atl., Tab. III, 

 figs. 20—21. 



Lo c. Koldewey Isl. (Algæ). 



Arct. Distr. Greenl. 



Navicula spectabilis Grey., var. densestriata Øst., Øst. Mar. D. 

 Østg., 436; Tab. VI, fig. 67. 



Lo c. Off Cape Amelie (Algæ. 2 sampl.), Koldewey Isl. (Algæ). 



Arct. Distr. E. Greenl. 



Piimularia Ehr., 1843. 

 Maritiœ CL, 1895. 

 Pinnularia bistriata Lead. Fortm., Gl. Syn., II, 95; Perag. D. 

 mar. d. Fr., Tab. XI, fig. 14. 



Lo c. Off Cape Amélie (Algæ), Koldewey Isl. (Algæ). 

 Hitherto recorded only from the Mediterranean, Ceylon, Labuan, Siam. 

 Pinnularia qvadratarea A. Sch., Gl. Syn., II, 95; A. Sch. N. S. D., 

 Tab. Ill, fig. 26. 



XLHI. 17 



