1923) 





MOORE AND CARTER — ALGAE FROM NORTH DAKOTA LAKES 417 



P. simplex Meyen. 



Strawberry Lake. 



Var. duodenarium (Bail.) Rabenh. 



Strawberry Lake. 



P. tetras (Ehr.)Ralfs. 



Cut-off Pond, Stump Lake; Odessa. I 



Order ULOTRICHALES 



Family Ulvaceae 



Genus enteromorpha Link. 



? Enteromorpha intestinalis Link. 



Mouth of Minnewaukon Bay, Devils Lake, below grade; 

 Wheeler's Pond. 



Probably this species but very fragmentary. 



E. prolifera J. Ag. 



Spring Lake; Wheeler's Pond, I; inlet of Lake A; Lake N; 

 Stump Lake. 



Enteromorpha sp. fragmentary. 



Gravel Lake; Alkaline Lake, II; Odessa, H; Lake C; Devils 

 Lake, near Station ; Lake A ; Lamoreau Lake. 



Family Cylindrocapsaceae 

 Genus cylindrocapsa Reinsch 



Cylindrocapsa geminella Wolle. 



Odessa, I. 



One short filament only found; fruit not present. 



Family Oedogoniaceae 



Genus oedogonium L. 



Oedogonium sp. sterile occurred in samples from Stump Lake, 

 Lake P, Lake O, Wheeler's Pond, I, Gordon Lake, Dion Lake, 

 Strawberry Lake, North Twin Lake, near Wing, Devils Lake, 

 near Station, Lake A. 



Bulbochaete sp. with immature fruit in pond, east end of 

 Spiritwood I, Bay. 



