vol.i] SetcheU-Gardner. — Algce of Xorth western America. 201 



This species is mixed with Spirogyra Grevilleana in this 

 locality. 



Spirogyra varians (Hassall) Kuetzing. 



On dripping rocks and in ditches of fresh water. Seldovia, 

 Cook Inlet. Alaska. Saunders (1901, p. 409); Whidbey Island, 

 Wash.. X.L.G., Nos. 233!, 666!, and in Collins, Holden and 

 Setchell. P. B.-A.. Xo. 962! ; East Sound, Orcas Island, Wash., 

 X.L.G.. Xo. 489!; Seattle, Wash., X.L.G., Xo. 660! 



The gatherings of this species show both lateral and scalari- 

 form conjugation. 



Spirogyra nitida (Ddlwyn) Link. 



In fresh water. Near Conpeville, Whidbey Island, Wash., 

 X.L.G.. Xo. 661! 



Spirogyra majuscula Knetzing. 



In a ditch of fresh water. Near the University of Washing- 

 ton. Seattle, Wash., X.L.G., Xo. 390! 



Our specimens seem to belong to the type, but differ from the 

 ordinary plants in having the fertile cells slightly swollen. 



Spirogyra majuscula var. brachymeres Stiz. 



On shore of Green Lake, near Seattle, Wash., Tilden, Xo. 285! 



Miss Tilden's specimen, in our copy, shows only the prelim- 

 inary stages of conjugation and leaves the species in doubt. 



Spirogyra affinis (Hassall) Petit. 



In fresh water stream. Xear Iliuliuk, Unalaska, Alaska, 

 W.A.S. and A..4.i./Xo. 5032!, and in Collins, Holden and 

 Setchell, P. B.-A., Xo. 959! 



Spirogyra Lutetiana Petit. 



Floating in a ditch of fresh water. Ravenna Park, Seattle, 

 Wash.. X.L.G.. Xo. 402! 



Spirogyra dubia var. longiarticulata Kuetzing. 



Pond of fresh water. Xear Victoria, B. C, X.L.G., No. 

 316!, and in Collins, Holden and Setchell, P. B.-A., No. 961! 



Spirogyra inflata (Vaucher) Rabenhorst. 



In a ditch of fresh water. Near Seattle, Wash., N.L.G., 

 Nos. 389!, 659! 



