90 F- BøKGESEN. 



Tribonema Derb, et Sol. 



1. T. bombycinum (Ag.) Derb, et Sol., Mém. pbys. Alg. p. 18, 

 tab. IV; fig. 16—21. Hazen, Ulothricaceæ, p. 184, tab. 25, fig. 1—3. 



Larsen, Freshw. Alg. East Greenl. p. 108 (Found in several localities from Kaj) 

 Dan (65° 31') to Sabine (74° 30'). 



Lat. cell. = 6-8//. 

 Loc. Lille Snenæs. 



Prasiolaceæ. 



Prasiola Ag. 



1. P. velutina (Lyngb.) Wille, Færøernes Ferskvandsalger (Bot. 

 Notiser, 1897, p. 32, tab. 1). 



Only a few filaments were found, but these agreed quite well 

 with the original specimen of Lyngbye. Only filaments with a single 

 ГОЛУ of cells were present. 



Lat. of the filament = 14 — 18//. 



Log. Lille Snenæs. 



Oedogoniaceæ. 



Oedogoiiium Link. 

 O. sp. Sterile. 

 Lat. fil. = 5,5 f J.. 



Loc. Found in a small lake at Hvalrosodde. 

 О. Sp. Sterile. 

 Lat. fil. == 11/^. 

 Loc. Found in the same locality as the above-mentioned. 



Bulbochaete Ag. 

 B. sp. Sterile. 

 A form with short cells. 

 Lat. cell. =24//; long. cell. = 27/^. 



Loc. b'ound in a collection from a small lake at Hvalrosodde. 

 В. sp. Sterile. 



A form with longer cells {Biilbochœte setigeral). 

 Lat. cell. = 24 /^. 

 Loc. Found in the same collection as the above--(mentioned. 



6—4—1910. 



