202 Universifu of California Publications. [hotany 



Spirogyra Spreeiana Rabenhorst. 



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

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



Spirogyra Weberi Knetzing. 



Fresh water . Seattle , Wash . , X.L.G., No . GG8 ! 



The specimens are not quite typical Spiroyifva Wehcri, l)ut 

 are intermediate between that species and Spirogj/m (/iKtdrafa 

 (Hassall) Petit. 



Spirogyra Grevilleana (Hassall) Knetzing. 



In a pond of slightly brackish water. Swantown, Whidbey 

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



Mixed, in the locality mentioned, with 8pirog\jra catenceformis. 



Spirogyra iaxa Knetzing. 



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

 K.L.G., No. 420! 



Family MESOCARPACE^. 



Mougeotia scalaris Hassall. 



In a ditch ))y the roadside. Orcas Island, Wash., X.L.G., 

 No. 47:J! 



Mougeotia genuflexa (Dillwyn) Agardh. 



In pools and ditches of freshwater. Victoria, B. C, K.L.G., 

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

 Wash., X.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.F:. 



Chlamydomonas sp. 



Under this genus are to lie })laced the several forms, or at 

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

 genus Gloeocystis. Here comes then, temporai'ily , Gloeocysiis Paro- 



