202 University of California Publications. [Butany 



Spirogyra Spreeiana Rabenhorst. 



Floating in a pond of fresh water. Penn's Cove, Whidbey 

 Island, Wash., N.L.G., No. 629! 



Spirogyra Weberi Kuetzing. 



Fresh water. Seattle, Wash., N.L.G., No. 663! 



The specimens are not quite typical Spirogyra Weberi, but 

 are intermediate between that species and Spirogyra quadrata 

 (Hassall) Petit. 



Spirogyra Grevilleana (Hassall) Kuetzing. 



In a pond of slightly brackish water. Swantown, Whidbey 

 Island, Wash., N.L.G., No. 417! 



Mixed, in the locality mentioned, with Spirogyra cateiueformis. 



Spirogyra laxa Kuetzing. 



In a small pond of fresh water. Whidbey Island, Wash., 

 N.L.G., No. 420! 



Family MESOCARPACE^. 



Mougeotia scalaris Hassall. 



In a ditch by the roadside. Orcas Island, Wash., N.L.G., 

 No. 473! 



Mougeotia genuflexa (Dillwyn) Agardh. 



In pools and ditches of fresh water. Victoria, B. C, N.L.G., 

 No. 314! ; Orcas Island, Wash., N.L.G., Nos. 473! , 481! ; Seattle, 

 Wash., N.L.G., Nos. 630!, 662! 



All the specimens are in good fruit and collected either in May 

 or July. In No. 481, both lateral and scalariform conjugation 

 occurs. 



Family VOLVOCACE^. 



Chlamydomonas sp. 



Under this genus are to be placed the several forms, or at 

 least some of them, which were at one time placed under the 

 genus Glceocystis. Here comes then, temporarily, Gloeocystis Paro- 



