Sir iV, Yermoloff- — Diatom Earth in California. 277 



(/) OTHER RADIATI, 



lunatus Grev. 

 velatus Elir. Rare. 

 subvelatiis Grun. Rare. 

 pectinatus Rattr. Frequent. Transi- 

 tional. 

 subaulaco-discoidalis Rattr. Not rare. 



ASTEROI,AMPRA. 



Grevillei Wallisch. Frequent. 

 rotula Grev. Frequent. 



ASTEROMPHALUS. 



Moronensis Rattr. Frequent. 

 Hooheri Ehr. Frequent. 



ACTINOPTYCHtrS. 



undulatus Ehr. Frequent. Very 

 small specimens. 



^ Melosira. 



sulcata biseriala. 



Stephanogonia (Cladogramma). 

 Calif or nica Grun. Not rare. 



Ch^toceros. 

 incurvum Bail. Rare. 



rest-spores. 

 Dicladia. 

 Syndendrium. 



Hercotheca mammillaris Ehr. 

 Other rest-spores. 



Raphoneis. 

 amphiceros Californica. Frequent. 



Thalassionema. 

 Nitzschioides Grun. Abundant. 

 Frauenfeldtii Grun. Abundant. 



Biddhlphia. 

 regina Wm. Sm. Rare. 

 Tuomeyii Bail. Rare. 



Tabellaria. 

 Sp. (?) 



COCCONEIS. 



Sp. (?) 



f^f^ 



i) 



