386 University of California Publications in Geology [Vol. 8 



PAGE 



Fauna 409 



Division A 409 



Division B 410 



Faunal List facing 410 



Eocky Ridge 412 



Stratigraphy and Lithology 412 



Relation of San Pablo to Monterey Group 412 



Lithology 413 



Fauna , 414 



Tice Valley Syncline 414 



Stratigraphy and Lithology i 414 



Relation of San Pablo to Monterey Group 414 



Lithology 414 



Fauna 415 



Other Localities 416 



Las Trampas Ridge 416 



Lafayette Ridge 416 



Danville 416 



Faunal List facing 416 



Complete List of Known Species from the San Pablo Group of Middle 



California, with Their Geologic Range 416 



Summary of Faunal List 424 



Summary of Evidence for Faunal Zones in San Pablo Group 424 



Relation of San Pablo Fauna to Recent Fauna 427 



Temperature Conditions of San Pablo Sea .-s ,427 



Correlation 428 



Previous Contributions 428 



Position of San Pablo Group in the Neocene Section of California 434 



Relation to the Etchegoin and Other Formations which are Correlated 



with the San Pablo 434 



Relation to the "Santa Margarita" 435 



Relation to the ' ' Jacalitos ' ' 435 



Relation to the Scutella breweriana beds , 436 



Age of the San Pablo 437 



Conclusions 442 



Bibliography 444 



Description of Species 446 



Pelecypoda 446 



Yoldia carnarosensis, n. sp 446 



Pinna alamedensis Yates 446 



Ostrea bourgeoisii Remond 447 



Pecten (Plagioctenium) bilineatus, n. sp 448 



Pecten (Pecten?) cierboensis, n. sp. 449 



Pecten (Plagioctenium?) crassiradiatus, n. sp 450 



Pecten (Pecten) raymondi, n. sp 450 



Pecten (Chlamys) pabloensis Conrad 452 



Pecten (Pallium) holwayi, n. sp 454 



Pecten (Pallium) holwayi, n. sp 454 



Pecten (Patinopecten) weaveri, n. sp 454 



Mytilus merriami, n. sp 455 



Mytilus perrini, n. sp 456 



Mytilus (Mytiloconcha) trampasensis, n. sp. 457 



