AKNOLD — THE PALEONTOLOGY AND STRATIGKAPHY OF SAN PEDRO. 



39 



GASTROPODA. 



Acmaa depicla Gould 



Acmaia iiisessa Hinds 



Acmaa iiistabiiis Gould 



Acmaa mitra Eschscholtz 



Acmaa paleacea Gould 



Acmaa pella Eschscholtz 



Acmaa spectrum (Nuttall) Reeve 



Actaoti (Rictaxis) punctocalata Carpenter. 



Actaon traskii Stearns 



Admete gracilior Carpenter 



Amphissa corrugata Reeve 



Amphissa ventricosa, sp. nov 



Amphissa versicolor Dall 



Bela fidicula Gould , 



Bela sanctm-monica sp. nov 



Bitlium asperum Gabb 



Bitlium cali/ornicum Dall &, Bartsch 



Bittium filosum Gould 



Biliium quadrijilatum Carpenter 



Bitlium rugaium Carpenter 



Bitlium williamsotii, sp. nov 



Bulla punctulata A. Adams 



Bulla quoyi Gray 



Cacum cali/ornicum Dall 



Cacum crebricinctum Carpenter 



Cacum magnum Stearns 



Calliostoma annulatum Martvn 



CaUiosloma caniculatum Martyn 



Calliostoma costatum, Martyn 



CaUiosloma gcmmutalum Cakpenteh 



Calliostoma tricolor Gabb 



Canccllaria cooperi Gabb 



Cancellaria craw/ordiana Dall 



Canrellaria tritonidia Gabb 



> 

 i3 



en it 



P.4 



S 

 X 

 N 

 X 

 X 

 X 

 X 

 X 



9 



E 

 X 

 E 

 X 

 N 

 E 

 X 

 E 

 N 

 X 

 X 



9 



s 



X 

 X 

 X 



•I 



X 

 X 

 X 

 X 

 X 

 X 



s 



E 



Pleistocene. 



Upper San Pedro. 



3^ 



M 



R 

 M 

 R 

 R 



K 



C 

 R 

 C 

 R 

 C 

 R 

 R 

 R 



M 

 M 

 M 

 M 

 M 

 R 

 R 

 E 



M 



E 



R 

 C 



K 

 E 





 E 

 R 

 R 



•C tf] 



I'? 



E 



M 

 E 

 C 



c 



E 



C 

 E 



E 

 M 



C 



M 

 R 



C 

 E 

 E 

 E 



Lower 

 San Pedro. 



a a 



T3 CO 



M 



E 

 E 

 E 



E 

 R 

 R 

 E 

 R 

 R 

 M 

 R 

 M 

 M 

 C 



C 

 R 

 R 



M 

 R 



55 



M 



M 

 M 

 C 



M 

 C 

 E 



M 

 R 



En 



M 



B 



