392 



CALIFOENIA ACADEMY OF SCIENCES. 



EXPLANATION OF PLATE XV. 



Fig. I. 



Semele pulchra SowERBY. Upper San Pedro series, San Pedro. Longitude 



15 mm.; X3-3. 

 Same. Outline, showing convexity of valve; X3.3. 

 Tellina {Augu/us) brittoni Dall. Upper San Pedro series, San Pedro. Interior 



view. Longitude 13.5 mm.; X4.6. 

 Same as fig. 2. E,xterior view; X4-6. 

 Seme/e pulchra var. Tnontereyi, var. nov. Lower San Pedro series, Deadman Island. 



Longitude 14 mm.; X3.3. 

 Same. Outline, showing convexity of valve; X3.3. 

 Thyasira bisecta CoNRAD. Pliocene, Deadman Island. Longitude 74 mm. ; 



XI. I. 



Carditim i^Rmgicardiiwi) procerum Sowerby. Upper San Pedro series, San 



Pedro. Exterior view. Longitude 73 mm.; natural size. 

 Tellina {Anguliis) idee Dall. Upper San Pedro series, Los Cerritos. Longitude 



62 mm.; X0.7. 



Tellina {Anguliis) bodegefisis Hinds. 



Longitude so mm. ; natural size. 

 Tellina {Angulus) rubescens Hanley. 



Longitude 42 mm.; natural size. 



Upper San Pedro series, San Pedro. 

 Upper San Pedro series, San Pedro. 



166 

 166 



157 



157 



166 

 166 



135 



139 



158 



158 



159 



