88 F- Børgesen. 



Lat. cell, sire spin. = 33 a. 



Found in coxlections from Vester Elv. 



Lo с. Danmarks Havn. 



Hyalotheca Ehrenb. 



1. H. dissiliens (Dilhv.) Bréb. in Ralfs Bril. Desm. p. 51, tab. 1, 

 fig. 1. 



Boldt, Desm, Grønl. p. 48 (Kung Oskars hamn). 

 Børgesen, Ferskvandsalg. Østgrønland, p. 32 (Hekla Havn). 



Larsen, Freshw. Alg. East Greenl. p. 93 (Falkefjeld, Jameson Land, Liverpool 

 Kyst in Hurry Inlet, Sabine 0). 



This species seems to be rather common; var. tridentula Nordst. 

 (Sydl. Norges Desm. p. 48, fig. 23) was found and most probably also 

 other forms occurred. 



Found in several collections from Vester Elv. 



Lo с. Danmarks Havn. 



Desmidiiim Ag. 



1. D. Swartzii Ag., Syst. Alg. p. 9. Ralfs, Brit. Desm., p. 61, 

 tab. 4. 



Børgesen, Ferskvandsalg. Østgrønland, p. 32 (Hekla Havn). 

 Larsen, Freshw. Alg. East Greenl., p. 90 (Kordlortok, Атака). 



Found in two collections from Vester Elv. 

 Lo с. Danmarks Havn. 



Zygnemaceæ. 



Zygnema (Ag.) De Bary. 

 Z. spec. 



Filaments of a sterile Zygnema were found rather richly in a 

 collection from Vester Elv. A few of the filaments had rhizoids; 

 perhaps we have to do with Zygogoniiim ericetorum. 



Also in a collection from "Lille Snenæs" a sterile Zygnema. 



Chlorophyceæ. 

 Pleurococcaceæ. 



Pleurococcus Menegh. 

 1. P. vulgaris Menegh., Näg. Gatt. einz. Alg. p. 64, tab. IV E, fig. 2. 



Børgesen, Ferskvandsalg. Østgrønland, p. 36 (Danmarks 0, Rode 0, Hekla Havn). 



Very few cells were found on bones. 

 Loc. Stormbugl. 



