Vol. 1] SetcheU-Gardner. — Alga of North tvestent America. 219 



Chastophora Cornu-Damae var. genuina De Toni. 



On sticks, sedges, and grasses, in pool of fresh water. East 

 Sound, Orcas Island, Wash., K.L.G., Nos. 4S4!, 497! 



Chaetophora Cornu-Damae var. linearis Knetziug. 



Sonth end of Lake Washington, near Renton, King Connty, 

 Wash., Til(le)i, No. 2G7! 



Ochlochaete Hystrix Thwaites. 



On water weeds in ponds of fresh water. Near Seattle, 

 Wash., Professor T. C. I). Kitu-aid, No. 768! 



Trentepohlia lolithus (L.) Wallroth. 



On rocks at 1000 feet elevation. Orca, Alaska, Saunders 

 (1901. p. 413). 



Family MYCOIDEACE^E. 



Pringsheimia scutata f. Cladophorae Tilden. 



On Cladophora, in tide pool. Port Renfrew, B. C, Tilden, 

 No. 382! 



We have examined the specimen distribnted hy Miss Tilden 

 in our copy of the American Algae and find an epiphyte which, 

 while bearing a certain snperticial resemblance to Pringsheimia 

 scutata Reinke, structurally shows itself clearly a member of the 

 Chamfpsiphoniacefp and probably identical with Wille's Chloro- 

 glopa tuberculosa, under which name it has been mentioned in its 

 proper sequence in this account. We feel that Miss Tilden 's 

 name is fairly properly to be i^laced as a synonym under Wille's. 



Family OEDOGONIAOEJh]. 



We have found no species of this family, ourselves, and can 

 only quote those enumerated by Miss Tilden and b.y Saunders, 

 the determinations of all of which are l).y Karl E. Hirn. 



CEdogonium concatenatum (Hassall) Wittrock. 

 Popof Island, Alaska, Saunders (1901, p. 412). 



