4 CONTENTS AND ILLUSTRATIONS. 



Part I. The Tertiary and Pleistocene Formations of C'alikornia — Continued. 

 Miocene — Continued. 



Monterey shale — Continued. Page. 



Fauna 21 . 



Pecten fauna 21 



List of Monterey shale ( middle Miocene ) fossilt! 21 



List of fossils from the Carrizo Creek beds (Miocene) 22 



San Pablo formation 22 



Type locality 22 



Name and description - 22 



Definition 22 



Localities 22 



Fauna 23 



Pecten fauna 23 



List of San Pablo formation (upper Miocene) fossils 23 



List of Santa Marijarita formation (= San Pablo) fossils from Salinas 



Valley and southward 2-1 



Pliocene - 25 



Purisima formation 25 



Type locality 25 



Name and description 25 



Definition 25 



Localities 26 



Fauna 26 



Pecten fauna - 26 



List of Purisima formation (lower Pliocene) fossils 27 



List of San Diejjo formation fossils 28 



Merced formation - 28 



Type locality 28 



Name and description 28 



Definition 29 



Localities 29 



Fauna 29 



Pecten fauna 29 



List of Merced formation ( upper Pliocene ) fo.-<sils 30 



List of Pliocene fossils from Deadman Island 30 



Pleistocene 31 



San Pedro formation 32 



Type locality 32 



Name and description 32 



Definition 32 



Localities •'2 



Fauna 33 



Pecten fauna 33 



Li.st of San IVdro formation ( Pleistocene) fossils 33 



Geologic range of the California Pectens 37 



Summary of the range of species and varieties -10 



Part IL Synopsis and Descru'tions of Sltsuenera and Speciks '. 41 



Synopsis of subgenera and aiiecies _ -11 



Summary of the subgenera and species -14 



Descriptions of subgenera and species 45 



Cienus Pecten MiiUer 45 



Subgenus Pecten s. .s. Midler 48 



Subgenus Patinopecten Dall 48 



Subgenus Nodipecten Dall 49 



