84 F- Børgesen. 



Eiiastrimi Ehrenb., Ralfs. 



1. E. binale (Turp.) Ehrenb., Berlin. Monatsber. 1840, p. 208. 

 Ralfs, Brit. Desm., p. 90, tab. 14, fig. 8 (partim). 



Boldt, Desm. Grønl., p. 8 (Kung Oskars hamn). 



Børgesen, Ferskvandsalg. Østgrønland, p. 31 (Danmarks 0, Gaasefjord, Hekla Havn). 



Larsen, Freshw. Alg. East Greenl., p. 91 (in several localities from Kordlortok 

 65° 40 to Sabine 74° 30'). 



Forms like Ralf's fig. 8 b and e were found in collections from 

 Vester Elv. 



Long. = 22//. 



subspec. dissimile Nordst., Desm. arct. p. 31, tab. VIII, fig. 31. 



Found in a gathering from the same locality. 



Long. = 28//; lat. = 20/^. 



Loc. Danniark.s Havn. 



2. E. cuneatum Jenner in Ralfs, Brit. Desm., 

 p. 90, tab. 32, fig. 3 a. 



Boldt, Desm. Grønl., p. 7 (Kung Oskars hamn). 



Børgesen, Ferskvandsalg. Østgrønland, p. 31 (Hekla Havn). 



The form found (Fig. 5) was somewhat smaller 

 than the typical form and had somewhat narrower 

 apices. It seems to come rather near the form men- 

 tioned by Raciborski in Nowe Desmidj^je, p. 30, 

 tab. VI, fig. 8. Gfr. also Boldt, 1. с. p. 7, tab. 1, fig. 7. 

 Long. = 86/^; lat. = 42//. 

 Fig. 5. E. cuneatum O^ly a few specimens were found in two collec- 



Jenner. Forma, tions from Vester Elv. 

 P°'i)- Loc. Danmarks Havn. 



3. E. elegans (Bréb.) Kütz., Phycol. germ., p. 135; Ralfs, Brit. 

 Desm., p. 89, tab. 14, fig. 7 a — d. 



Boldt, Desm. Grønl. p. 9 (Kung Oskars hamn). 

 Børgesen, Ferskvandsalg. Østgrønland, p. 31 (Hekla Havn). 



Larsen, Freshw. Alg. East Greenl. p. 91 (in several localities from Kordlortok 

 65° 40' to Sabine 74° 31'). 



Forms like Ralfs fig. 7 a and b (1. c.) were found in Vester Elv 

 and a small lake at Hvalrosodde. 



Loc. Danmarks Havn, Hvalrosodde. 



4. E. tetralobum Nordst., Desm. arct. p. 30, tab. VIII, fig. 30. 

 This characteristic and, it seems, true arctic species was not 



earlier known from East Greenland. Hitherto il was only known 

 from Spitzbergen and Nova Zembla. 



The form observed quite agreed with the figure and description 



of NORDSTEDT. 



Long. = 89/« ; lat. = 64//. 



It was found in several collections from Vester Elv. 



Loc. Danmarks Havn. 



