382 CALIFORNIA ACADEMY OF SCIENCES. 



EXPLANATION OF PLATE X. 



Pleurotoma ( Borsonia) hooveri, sp. nov. Lower San Pedro series, Deadman 



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



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

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



Tornatina culcitella Gould. Lower San Pedro series, Deadman Island. Longitude 



1 1 mm. ; X3-2. 190 

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



Tyi^e specimen. Longitude 14.4 mm.; XS-S- 236 



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



4.5 mm.; X5-5- 189 



Actizon (raskii SlRhRT^iS. 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) gausapata Gould. Upper San Pedro series, San Pedro. 



Longitude 10 mm.; X3- 239 



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



Island. Longitude 10 mm.; X3. 238 



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



San Pedro Longitude 7.7 mm. ; X3- 240 



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

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



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



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



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



Polynices ( Lunatia) Icwisii GouLD. Upper San Pedro series, San Pedro. Lon- 

 gitude 75 mm. ; X0.66.  315 

 Margarita pupilla G0VI.U. Pliocene, Deadman Island. Altitude 7.5 mm.; X3- 333 

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



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



Same specimen viewed from in front; XS- 320 



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



12 mm. ; X 1.5. 192 

 Fig. 19. Chlorostonia montereyi Kiener. Upper San Pedro series, Crawfish George's. 



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



