158 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



Descriptions of New Species — Continued ■ page 



Saxicava arnoldi 171 



Diplodonta dalli 171 



Chama pacifica 172 



Lima bella 172 



Actseon parvum 172 



Exilia weaveri 173 



Neverita nomlandi 173 



Murex vaughani 174 



Fasciolaria gabbi 174 



Cerithiopsis howardi 175 



Epitonium merriami 175 



Galeodea dalli 176 



Triforis martini 176 



Strepsidura packi 177 



Molopophorus stephensoni 177 



Littorina oligocenica 178 



Marginalia pacifica 178 



Fusinus gesteri 179 



Conus ruckmani 179 



Eulima clarki 179 



Seraphs andersoni 180 



Hipponyx arnoldi 180 



Hipponyx ornata 181 



Acmaea simplex 181 



Patella subquadrata 182 



Introduction and Acknowledgments 



Our knowledge of the Oligocene of the Pacific Coast is very 

 inadequate. In order that we may study the OHgocene, its 

 fauna must be first described. The descriptions of 36 new 

 species from a fauna of 48 specifically identifiable forms ob- 

 tained from a single locality are given below. Better testimony 

 concerning our ignorance of the Oligocene could hardly be 

 given when the discovery of a new locality by two such good 

 collectors and enthusiastic paleontologists as Mr. F. M. Ander- 

 son and Mr. Bruce Martin results in finding a fauna which is 

 75 per cent new. 



The fauna described in this paper was obtained from near 

 Vader, Washington, on the Cowlitz River, by Mr. F. M. 

 Anderson and Mr. Bruce Martin, the Curator and Assistant 

 Curator, respectively, of the Department of Paleontology of 

 the California Academy of Sciences. Mr. Martin describes 



