184 Universifij of California Publications. [botanv 



Oscillatoria splendida Greville. 



On imul in fresh water pools. Seattle, Wash., X.L.O., Nos. 



578!, 580! 



Oscillatoria splendida f. uncinata Setchell and Gardner 

 f. now Plate Id. 



Agreein^j' in all respects with the type except that the tip of 

 the filament shows an nnusuallj' long, capitate cell which is very 

 markedly uncinate, and the filaments are flexuoiis and coiled. 



On damp mud at the bottom of a i)ool nearly dried up. Oak 

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



Oscillatoria amoena (Knetzing) Gomont. 



Lining the bottom of the outlet of a hot si)ring, temperature 

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

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



Oscillatoria laetevirens Orouau. 



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 Fh. aidumnalc (Agardh) Gomont, in ditches by 

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

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



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

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

 locality. 



Phormidium Valderianum (Deli)onte) Gomont. 



On di'ipping timber of old mill. Sitka. .Vlaska, H^A.^S. and 

 A.A.L., No. 5204! 



The Plioi-niidinm is intermingled with a sterile Zvgnema. 



