388 CALIFORNIA ACADEMY OF SCIENCES. 



EXPLANATION OF PLATE XIIL 



Fig. I. Coopcrella suhdtaphaiia Carpenter. Lower San Pedro series, Deadnian Island. 



Interior, showinjj hinge. Longitude 12.5 mm.; X5. 153 



Fig. 2. Callista subdiaphaiia var. pedroaiia, var. nov. Lower San Pedro series. Dead man 



Island. Type specimen. Longitude 33 mm.; xo.8. 144 



Fig. 3. Aligeiia ccrri/ensis, sp. nov. Upper San Pedro series, Los Cerritos. Type speci- 

 men, view of interior. Longitude 1C.9 mm.; X3. 138 

 Fig. 4. Callisla sitbdiaphana Carpenter. Pliocene, Deadman Island. Longitude 45 mm.; 



X0.8. 

 Fig. 5. Psepkts ia7itil/a GovLD. Lower San Pedro series, Deadman Island. View of inte- 

 rior. Longitude 6 mm. ; X4. 133 

 Fig. 6. Pecten ( Pathiopec(en) caurinus Gould. Pliocene, Deadman Island. Exterior of 



left valve. Altitude 122 mm.; xo.8. 107 



Fig. 7. Tellina ( Moeretla) salvionea Carpenter. Lower San Pedro series, Deadnian 



Island. Interior of right valve. Longitude 14 mm. ; X3.3. 157 



Fig. 8. Do7iax Icevigata Dkshaves. Upi)er San Pedro series, San Pedro. Interior view. 



Longitude 21 mm.; X2.5. 170 



Fig. 9. Donax cali/ornica Conrad. Lower San Pedro series, Deadnian Island. Interior 



view. Longitude 17 mm.; X2.5. 170 



144 



