184 University of California Publications. [botany 



Oscillatoria splendida Greville. 



On mud in fresh water pools. Seattle, Wash., K.L.G., Nos. 



578!, 580! 



Oscillatoria splendida f. uncinata Setchell and Gardner 

 f. now Plate 19. 



Agreeing in all respects with the type except that the tip of 

 the filament shows an unusually long, capitate cell which is very 

 markedly uncinate, and the filaments are flexuous and coiled. 



Ou damp mud at the bottom of a pool nearly dried up. Oak 

 Harbor, Whidbey Island, Wash., X.L.G., No. 574! 



Oscillatoria amcena (Kuetziug) Gomont. 



Lining the bottom of the outlet of a hot spring, temperature 

 80°-120° F. Sitka, Alaska, Saunders (1901, p. 397); ou mud 

 in a ditch of fresh water, Seattle, Wash., N.L.G., No. 580! 



Oscillatoria lastevirens Crouan. 



In a salt marsh. Head of Penn's Cove, Whidbey Island, 

 Wash., N.L.G., No. 471! 



The specimen is referred here with some doubt as the fila- 

 ments are somewhat larger than the measurements given for this 

 species, and the cells are provided with large granules. 



Oscillatoria Okeni Agardh. 



In pond of brackish water. Monroe's Landing, near Coupe- 

 ville, Whidbey Island, Wash., X.L.G., No. 596! 



Phormidium foveolarum (Montague) Gomont. 



Mixed with Ph. autumnale (Agardh) Gomont, in ditches by 

 the roadside Pleasant Ridge, near La Conner, Skagit County, 

 Wash.. N.L.G., No. 331! 



The sheaths of this species are diffluent into a very soft jelly 

 much different from that of the species associated with it in this 

 locality. 



Phormidium Valderianum (Delponte) Gomont. 



On dripping timber of old mill. Sitka, Alaska, W.A.S. and 

 A.A.L.. No. 5204! 



The Phormidium is intermingled with a sterile Zyguema. 



