vol.i] Setch el I- Gardner. — Algce of Northwestern America. 219 



Chaetophora Cornu-Damae var. genuina De Toni. 



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

 Sound, Orcas Island, Wash., X.L.G., Nos. 484!, 497! 



Chaetophora Cornu-Damae var. linearis Kiietzing. 



South end of Lake Washington, near Renton, King County, 

 Wash.. Tilde n. No. 267! 



Ochlochaete Hystrix Thwaites. 



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

 Wash.. Professor T. C. D. Kincaid, No. 768! 



Trentepohlia Iolithus (L.) Wallroth. 



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

 (1901, p. 413). 



Family MYCOIDEACE.E. 



Pringsheimia scutata f. Cladophorse Tilden. 



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

 No. 382! 



We have examined the specimen distributed by Miss Tilden 

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

 whde bearing a certain superficial resemblance to Pringsheimia 

 scutata Reinke, structurally shows itself clearly a member of the 

 Chamaesiphoniacea? and probably identical with Wille's Chloro- 

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

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

 name is fairly properly to be placed as a synonym under Wille's. 



Family ffiDOGONIACE^. 



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

 only quote those enumerated by Miss Tilden and by Saunders, 

 the determinations of all of which are by Karl E. Him. 



CEdogonium concatenatum (Hassall) Wittrock. 

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



