1917] 
MOORE—ALGAE OF DEVILS LAKE, NORTH DAKOTA 301 
Genus ULOTHRIX Kuetzing 
Ulothrix zonata (Web. & Mohr) Kuetzing, Flora 16: 
519. 1833. With Cladophora Kuetzimgiana along shore. 
Family ULVACEAE 
Genus ENTEROMORPHA Link 
Enteromorpha prolifera (Fl. Dan.) J. С. Agardh, Lunds 
Univ. Aarsskrift 19 : 129. 1882. Very abundant іп Lamoreaux 
Bay. Scattered elsewhere along shore and on rock pile near 
opposite shore from Biological Station. Although Entero- 
morpha is ordinarily regarded as a marine form, E. prolifera 
has been reported from several fresh-water lakes in the west. 
Genus PROTODERMA Kuetzing 
Protoderma viride (?) Kuetzing, Рус. Gen. 295. 1843. Оп 
stones along shore. Cells resembled those of P. viride seen 
from other localities but the life history could not be followed, 
and the determination must be regarded as doubtful. 
Family СнАЕТОРНОВАСЕАЕ 
Genus STIGEOCLONIUM Kuetzing 
Stigeoclonium nanum (Dillw.) Kuetzing, Spec. Alg. 354. 
1849. Attached to Cladophora and associated with Entero- 
morpha. Agrees closely with published descriptions and 
figures of this species, as well as with the specimen in Collins, 
Holden & Setchell’s ‘Phycotheca,’ No. 867. No indication of 
being a state of some other species, suggested as a possibility 
by Collins. 
Order SIPHONOCLADIALES 
Family CLaDOPHORACEAE 
Genus cLapopHoRA Kuetzing 
Cladophora Kuetzingiana Grunow in Rabenhorst, Fl. Eur. 
Alg., Sect. 3: 342. 1868. Very abundant in various localities 
along the shore. 
1 Collins, Е. S. The green algae of North America. p. 300. 1909. 
