TERTIARY FOSSILS. 107 



O. VESPERTINA, Con. 



Ostrea vespertina, Con. ; Jour. Phil. Acad., 2 Ser., Vol. 2, p. 300. 

 O. vespertina, Con. ; P. R. R. Rep., Vol. 5, p. 325, pi. 5, fig. 36, 38. 

 Pliocene, Colorado Desert, Santa Barbara. 



O. Heermanni, Con. 



Ostrea Heermanni, Con. ; Proc. Phil. Acad., 1855, p. 267. 

 0. Heermanni, Con. ; P. R. R. Rep., Vol. 5, p. 32G. 

 Pliocene, Colorado Desert. 



O. Titan, Con. 



Ostrea Titan, Con. ; P. R. R. Rep., Vol. 6, p. 72, pi. 4, fig. 17 ; pi. 5, fig. 17 a. 



Miocene, Kirker's Pass, South of Mount Diablo, Walnut Creek, Estrella, San 

 Luis Obispo, Ojai Ranch, Cuyama R. Canon, Tulare Valley, and through- 

 out the Coast Range wherever the Upper Miocene is found. 



TAMIOSOMA, Con. T. gregaria, Con. 



Tamiosoma gregaria, Con. ; Proc. Phil. Acad., 1856, p. 315. 



Tamiosoma gregaria, Con. ; P. R. R. Rep., Vol. 6, p. 72, pi. 4, fig. 18. 



Balanus Estrcllanus, Con. ; P. R. R. Rep., Vol. 7, p. 195, pi. 8, fig. 1. 



Radiolites gregaria, Con. ; Proc. Phil. Acad., 1864, p. 214. 



Tamiosoma gregaria, Gabb ; Pal. Cal., Vol. 2, p. 61, pi 18, fig. 22, a, b, c, d 



Miocene, Estrella, Santa Marguerita Ranch, Tulare Valley. 



POLYZOA. 

 CELLEPORA, Fabr., Auct. C. Californiensis, G. &. H. 



Cellepora Californiensis, Gabb & Horn. ; Jour. Phil. Acad., 1862, p. 130, fig. 12. 

 Post-Pliocene, Santa Barbara. Living.* 



* All the Polyzoa in this list are from the Post-Plioeene marl of Santa Barbara. 

 Most of them, if not all, have been found living on the coast, and I have made 

 extensive collections of the recent Pacific forms, which, to my great regret, I have 

 not been able to study, partly for want of time, and partly because my eyes will 

 not permit the use of the microscope. My friend. Dr. S. B. Howell, Secretary of 

 the Philadelphia Academy of Natural Sciences, has kindly undertaken the work, 

 and I trust that his results will be as useful as the subject is interesting. I have 

 retained here the Orbignyan generic names and classification, simply as a matter 



