i88 



CALIFORNIA ACADEMY OF SCIENCES [Proc. 30 Ser. 



Agasoma gravidtini Gabb 

 Agasoma kernianum Cooper 

 Agasoma sinuahmi (?) Gabb 

 Conus otveniana n. sp. 

 Neverila callosa Gabb 

 Turritella ocoyana Conrad 

 Ctinia biplicosta Gabb 

 Oliva californicus n. sp. 

 Scaphander jugularis Conrad 

 Trophon kernensis n. sp. 

 Dentalium subsiriafiwi Conrad 

 Dentaliiiin sp. 

 Pleurotoma ( ClathureUa) dumbleana 



n. sp. 

 Nassa arnoldi n. sp. 

 Trochita filosa Gabb 

 Crcpidula pracrupta Conrad 

 Purpura lima Martyn 

 Sigarctus scopulostis Conrad 

 Terebra cooperi n. sp. 

 Bullia {Molopophorus) anglona^ia 



n. sp. 

 Cancellaria pacificus n. sp. 

 Cancellaria joaquinensis n. sp. 

 Cancellaria condoni n. sp. 



Cancellaria simplex n. sp. 

 Cancellaria dalliana n. sp. 

 Cy there a ( Callista) niathezvsoni 



Gabb 

 Vemis {JMercenaria) pertemiis 



Gabb 

 Venus ( Chione) teniblorensis n. sp. 

 Dosinia ^nalhewsoyii Gabb 

 Dosinia sp. 



Mactra {Spisula) /alcata Gould 

 Mactra sp. 



Pachydesma inezana Conrad 

 Pecten discus Conrad 

 Solen sicarius Gould 

 Solen sp. 



Tcl/ina ocoyana Conrad 

 Tellina sp. 



Yoldia impressa Gabb 

 Lucina richthofeni Gabb 

 Area montcreyana Osinont 

 Corbicula dumbleana n. sp. 

 Leda oregona Shumard 

 Cytherea sp. 

 Hotnomya sp. 

 Pectunculus sp. 



Many yet undescribed species occur in this collection, and 

 the locality is well worth a more exhaustive stud3\ On the 

 whole it probably better represents the Lower Miocene 

 fauna of the California interior than an}^ other locality 

 that has been described. 



Correlations. 



It is not at present possible to correlate with much accuracy 

 the Tertiary beds of the Mount Diablo Range with others 

 occurring in distant parts of the Coast or of the State. 

 For the Pliocene, and perhaps also the Miocene periods, a 

 number of minor provinces must be recognized along the 

 Pacific border, corresponding to the physical geography of 

 the time. North of the Klamath Mountains the Miocene 

 and Pliocene faunas are in a measure specifically different 

 from those of Central California, while these are in turn 

 somewhat unlike those of the southern coast of California. 



