CALIFORNIA ACADEMY OF SCIENCES. 437 



Ehaphidium polymoephum, Rabh. 

 Merismopedia glauca, Nag. 

 Ophiocytium cuspidatum, Bailey. 

 Ophiocytium cochleare, a. Br. 

 Ophiocytium majus, Nag. 

 (Edogonium undulatum, a. Br. 

 GEdogonium cryptoporum, Wittr. 

 NosTOC — a small form. 

 Conferva. ? 



Diatoms — several species. 

 Lyngbya. ? 



