ARNOLD — THE PALEONTOLOGY AND STEATIGBAPHY OF SAN PEDEO. 



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Mytilimeria niittalli Conrad 



Necera peciinata Carpenter 



Nucula {Acila) casirensis Hinds 



Nucula siiprasiriata Carpenter 



Ostrea liirida Carpenter 



Panoniya ampla Ball 



Panopea generosa Gould 



Pecten (Patinopecten) caurinus GotJLD 



Pecien (Pecten) denlatus Sowerby 



Pecten (Chlamys) hasiatus Sowerby 



Pecten (Chlamys) herkeus Gould 



Pecten (Chlamys) hericeus Yar. strategns Dall.. . 



Pecten (Chlamys) jordani, sp. nov 



Pecien latiauritus Conrad 



Pecten latiauritus var . fragilis, Yar. hoy 



Pecten latiauritus Yar. monoiimeris Conrad 



Pecten (Plagioctenium) newsomi, sp. nov 



Pecten stearnsii Dall 



Pecien (Nodipecten) subnodosus Sowerby 



Pecten (Plagioctenium) ventricosus Sowerby.... 

 Pecten (Plagioctenium) ventricosus Sowerby var. 



Periploma argentaria Conrad 



Petricola carditoides Conrad 



Petricola (Petricolaria) cognata C. B. Adams... 



Petricola denliculata Sowerby 



Pholadidea penita Conrad 



Platyodon cancellatus Conrad 



Pododesmus (Moitia) macroschisma Desha yes... 



Protocardia centifilosa Carpenter 



Psammobia edentula Gabb 



Psephis aalmonea Carpenter 



Psephis tantilla Gould 



Rceta undulata Gould 



Rupellaria lamellifera Conrad 



Sanguinolaria nuttaUi Conrad 



Saxidomus aratus Gould 



a u 

 wo 



X 

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N 

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s 



X 

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? 



c 



N 

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Pleistocene. 



Upper San Pedro. 



P 



K 



M 



K 



E 

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E 

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M 

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rt O 



E 



E 



M 



M 

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Lower 

 Sau Pedro. 



E 

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E 

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E 



R 



R 



M 

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R 



R 



R 

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E 



R 



E 

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as 



R 



E 

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M 

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M 



ga 



E 



