392 



CALIFORNIA ACADEMY OF SCIENCES. 



EXPLANATION OF PLATE XV. 



Fig. I. 



Semele puldira Sowerby. Upper San Pedro series, San Pedro. Longitude 



15 mm. ; X3 3. 166 



Same. Outline, showing convexity of valve; X3-3. 166 



Tellina {Angu/us) buttotii D.\ll. Upper San Pedro series, San Pedro. Interior 



view. Longitude 13.5 mm. ; X4.6. 157 



Same as fig. 2. E.xterior view; X46. 157 



Semele pulchra var. fitoiilereyi, var. nov. Lower San Pedro series, Deadman Island. 



Longitude 14 mm.; X3.3. 166 



Same. Outline, showing convexity of valve; X3.3. 166 



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



XI. I. 135 



Cardium {Ringicardmm) procerum Sowerby. Upper San Pedro series, San 



Pedro. Exterior view. Longitude 73 mm.; natural size. 139 



Tellina i^Angulus) idee Dall. Upper San Pedro series, Los Cerritos. Longitude 



62 mm.; X0.7. 158 



Tellina {Angnhis) bodegetisis Hinds. Upper San Pedro series, San Pedro. 



Longitude 50 mm. ; natural size. 158 



Tellina (Angvlus) rnbescens Hanley. Ufjper San Pedro series, San Pedro. 



Longitude 42 mm.; natural size. 159 



