List of Freshwater Algæ. 7o 



Found together with the above-mentioned species under similar 

 conditions. 



Loc. Lille Snenæs, Thermometer Fjeld. 



3. G. Magma (Bréb.) Kütz., Tab. Phycol. I, tab. 22, fig. 1. 



Horgesen, Ferskvandsalg. Østgrønland, p. 6. 



Found among other Algæ {Nostoc etc.) and Musci near the foot 

 of a glacier and in blackish incrustations on stones. 

 Loc. Lille Snenæs, Thermometerfjeld. 



Coelosphaeriiim Näg. 



1. C. lacustre (Chodal) Ostenf., Beitr. z. Kenntnis d. Algentlora 

 des Kossogol-Beckens (Hedwigia, Bd. 46. p. 39(5, tab. IX, fig. 6—7). 



The pear-shaped cells in the colony were somewhat closer 

 together than in the figure of Ostenfeld. 



Lat. cell. == 2,5«. 



Dr. Ostenfeld has most kindly seen the plant in question and 

 told me that it seems to him identical with this species. 



Found in a collection from Vester Elv. 



Loc. Danmarks Havn. 



Merismopediiim Meyen. 

 1. M. glaucum (Ehrb.) Näg., Gattung, einz. Algen, p. 55. 



Børgesen, Ferskvandsalg. Østgrønland, p. 7 (Hekla Havn). 



A few specimens were found in collections from Vester Elv. 

 Loc. Danmarks Havn. 



Oscillariaceæ. 



Phorniidiiim Kütz. 

 1. Ph. autumnale (Ag.) Gom., Monograph. Oscill. p. 207, tab. V, 

 fig. 23—24. 



Borgesen, Ferskvandsalg. Østgrønl., p. 7 fHekla Havn . 



Found as blackish crusts among other algæ and mosses on wet 

 earth near a glacier. 



L o c. Thermometerljeld. 



Rivulariaceæ. 



Calothrix Ag. 



C. parietina (Näg.) Thur., Bornet et Flahaull, Revision des 

 Nostoc. héter. I, p. 366. 



Found together with G/oeocapsa-species as blackish crusts on 

 stones from the bottom of a dry mountain lake. 



