vol.i] Setchell— Gardner. — Algcc of Northwestern America. 187 



Lyngbya aestuarii f. natans Gomont. 



Floating on pools in salt marshes. West and east shores of 

 Whidbey Island, Wash., X.L.G., Nos. 421!, 571!, 598!, and in 

 Collins, Holden and Setchell, P. B.-A., No. 904! 



Lyngbya aestuarii f. ferruginea Gomont. 



In pools in salt marshes. Near Conpeville, Whidbey Island, 

 Wash., X.L.G., No. 301! 



Intermingled with the next form. 



Lyngbya aestuarii f. spectabilis (Thuret) Gomont. 

 Intermingled with the last. 



Lyngbya aestuarii f. aeruginosa Gomont. 



Floating on pools in salt marshes. Whidbey Island, Wash., 

 X.L.G.. Nos. 230!, 429!; Port Townsend, Wash., N.L.G., 

 No. 610! . and in Collins, Holden and Setchell, P. B.-A., No. 902! 



Lyngbya semiplena (Agardh) J. Agardh. 



Salt marsh. Whidbey Island, Wash., X.L.G., No. 615! 



Lyngbya spirulinoides Gomont. 



Floating among various filamentous alga?. Lake Washington, 

 Seattle. Wash.. X.L.G.. No. 493! 



Lyngbya aerugineo-caerulea (Kuetzing) Gomont. 



Intermingled with other filamentous alga?. Small pond on an 

 island in the Huir Glacier, Alaska, Saunders (1901, p. 398); 

 Juneau. Alaska, Saunders (1901, p. 398). 



Lyngbya versicolor (Wartmann) Gomont. 



Floating on a deep pool of fresh water. Glacier Valley, 

 Unalaska, Alaska, A.A.L., No. 5024! 



Lyngbya Lagerheimii (Moebius) Gomont. 



Among various filamentous algse. Whidbey Island, Wash., 

 X.L.G., No. 303! ; sulphur spring, Ravenna Park, Seattle, Wash., 

 X.L.G., No. 400! 



Lyngbya ochracea (Kuetzing) Thuret. 



In gelatinous masses on moist bank of creek. Near Port 

 Renfrew, B.C., Tilden, No. 588! 



