List of Freshwater Algæ. 89 



Oocystaceæ. 



«г 



Oocystis Nagl. 

 О. spec? 



А few colonies were found of an Oocystis-Vike plant. The cells 

 were roundish-oblong and occurred two together in the mother-cell. 

 Long. cell. = 32/i; lat. =^ 2i n. 

 Found in a collection from a small lake. 

 Loc. Hvalrosodde. 



Hydrodictyaceæ. 



Pediastrum Meyen. 

 P. spec. 



A quite young colony was once found in a collection from 

 Vester Elv. 



Loc. Danmarks Havn. 



Coelastraceæ. 



Coelastrum Näg. 



L C. microporum Näg. in A. Braun, Alg. unie. p. 70. 

 Found in two collections from Vester Elv. 

 Loc. Danmarks Havn. 



Ulothricaceæ. 



Stichococcus Näg. 



L S. bacillaris Näg., Gatt. einz. Alg. p. 76, tab. IV G, fig. L 



f. confervoidea Hazen., The Ulothricaceæ and Chaetophoraceæ 

 of the и. S. p. 160, tab. 22, fig. 2, 3. 



Was found in form of longer or shorter filaments between Zyg- 

 nema. 



Breadth of the cell 2,7//, the length 2—4 times as great. 



Found in a collection from Vester Elv. 



Loc. Danmarks Havn. 



Microspora Thur. 



L M. stagnorum (Kütz.) Lagerh., Entwickelungsg. einiger Con- 

 fervaceen (Ber. d. d. bot. Ges. 1887, p. 417). Hazen., Ulothricaceæ, p. 176, 

 tab. 24, fig. 12, 13. 



Larsen, Fresh w. Alg. East GreenL p. 108 (Falkefjeld, Jameson Land, Sabine 0). 



Lat. cell. = 8,5 fi. 

 Loc. Lille Snenæs (422). 



