382 CALIFORNIA ACADEMY OF SCIENCES. 



EXPLANATION OF PLATE X. 



Pleiirototna ( Borsonia) lioovert, sp. nov. Lower San Pedro series, Deadman 



Island. Type specimen. 12.7 mm.; X3. 201 



Phorcus pidligo Martyn. Upper San Pedro series, Crawfish George's. Speci- 

 men slightly tilted back. Altitude 17.5 mm.; natural size. 328 



Tornathia culciiella GoULD. Lower San Pedro series, Deadman Island. Longitude 



11 mm.; X3-2. 190 

 Columbella solidula var. precursor, var. nov. Upper San Pedro series, San Pedro. 



Type specimen. Longitude 14.4 mm.; XS-S. 236 



Tornaiina cerealis Gould. Lower San Pedro series, San Pedro. Longitude 



4.5 mm.'; X5-5- 189 



Actaon //-a^/^n Stearns. Upper San Pedro series, San Pedro. Longitude 14 mm.; 



X3- 188 



Columbella ( Astyris) iuberosa Carpenter. Upper San Pedro series, San Pedro. 



Longitude 6.5 mm. ; X3- 240 



Columbella (Astyris) gatisapata Gould. Upper San Pedro series, San Pedro. 



Longitude 10 mm.; X3- 239 



Columbella (Astyris) californiana Gaskoin. Lower San Pedro series, Deadman 



Island. Longitude 10 mm.; X3- 238 



Colu77ibella (Astyris) gausapata var. carinata Hinds. Upper San Pedro series, 



San Pedro Longitude 7.7 mm. ; X3- 240 



Tor7iatina eximia Baird. Pliocene, Deadman Island. Longitude 12.5 mm.; X3. 190 

 Polynices ( Neverita) reclusiana Petit. Upper San Pedro series, San Pedro. 



Typical shape. Altitude 17.5 mm.; natural size. 314 



Natica ( Cryptonatica) clausa Broderip & Sowerbv. Pliocene, Deadman Island. 



Shouldered variety. Altitude 26 mm.; natural size. 313 



Polyyiices ( Lunatia) lewisii Gould. Upper San Pedro series, San Pedro. Lon- 

 gitude 75 mm.; X0.66. 315 

 Margarita piipilla Govi^u. Pliocene, Deadman Island. Altitude 7.5 mm.; X3- 333 

 Delphinoidea coronadoemis, sp. nov. Pleistocene, Spanish Bight, San Diego. 



Type specimen, view from above. Maximum diam. 2 mm.; X5- 320 



Same specimen viewed from in front; XS- 3^0 



Cylichia alba Brown. Lower San Pedro series, Deadman Island. Longitude 



12 mm. ; X 1.5. 192 

 Fig. 19. Chlorostoma 7no7itereyi Kiener. Upper San Pedro series, Crawfish George's. 



Specimen slightly tilted back. Altitude 28 mm. ; natural size. 326 



