388 CALIFORNIA ACADEMY OF SCIENCES. 



EXPLANATION OF PLATE XIIL 



Fijj. I. Coopcrella subdiaphana Carpenter. Lower San Pedro series, Deadman Island. 



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



Callista subdiaphana var. pedtoana, var. nov. Lower San Pedro series, Deadman 



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



Aligeiia cerrile^isis, sp. nov. Upper San Pedro series, Los Cerritos. Type speci- 

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

 Callisla subdiaphajia Ch'S.V'E'iiTE'R. Pliocene, Deadman Island. Longitude 45 mm.; 



X0.8. 144 



Psephis tajitilla Gould. Lower San Pedro series, Deadman Island. View of inte- 

 rior. Longitude 6 mm. ; X4. 133 

 Pectcn ( Patinopectcn) caurinus Gould. Pliocene, Deadman Island. Exterior of 



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



Tellina (Moerella) salmonea Carpenter. Lower San Pedro series, Deadman 



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



Fig. 8. Donax lavigata Deshayes. Upper San Pedro series, San Pedro. Interior view. 



Longitude 21 mm.; X2.5. 170 



Fig. 9. Donax cali/oniica Conrad. Lower San Pedro series, Deadman Island. Interior 



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



