ARNOLD — THE PALEONTOLOGY AND STKATIGRAPHY OF SAN PEDKO. 



45 



Scala hindsii Carpexter 



Scala indianorum Carpenter 



Scala tincta Carpenter 



Sella assimilata C. B. Adams 



Serptilorbh squaniitjrrtcs Carpenter 



Styaretus debilis Gould 



Siphonalia hellettii Forbes 



Solariella cidaris A. Adams 



Solariella peramabilis Carpenter 



Spirogti/phtis Utuella Morch 



Styliferina tenuisculpta Carpenter 



Taranis slrongi sp. nov 



Terebra (Acus) simplex Carpenter 



Thalotia caffea Gabe 



Tornalina cerealis Gould 



Tornatina culcitella GooLD 



Tornaiina iximia Ba:rd 



Tornatina harpa Dall 



Triforis adversa Montague 



Trivia cali/ornica Gray 



Trivia solandri Gray 



Tritonium gibbontm Broderip 



Trophon (Boreolrophon) ccrritcnsis, sp. nov 



Trophon [Boreolrophon) gracilis Perry 



Trophon (Boreolrophon) multicostatus Eschscholtz 



Trophon [Boreolrophon) pedroanus, sp. uov 



Trophon {Boreolrophon) scalariformis Gould 



Trophon stuarti Smith 



Trophon orpheus var. pracursor, var. nov 



Trophon (Boreolrophon) lenuisculpla Carpenter... 



Trophon [Boreolrophon) triangulatus Carpenter.. 



Turhonilla adliri (Dall & Bartsch), sp. nov 



Turbonilla arnoldi (Dall & Bart.sch), sp. nov 



Turbonilla aurantia Carpenter 



Turbonilla crebrijllala Carpenter 



&4 



X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 



c 



X 



') 



E 

 X 

 X 

 X 

 X 

 X 

 X 

 N 

 X 

 X 



s 



E 

 X 



N 

 E 

 N 

 N 

 E 

 E 

 X 

 E 

 E 

 X 

 X 



Pleistocene, 



Upper San Pedro. 





R 

 R 

 R 



M 



R 



C 

 C 

 R 



M 

 R 

 R 



M 

 R 



R 



R 

 R 

 R 



R 

 R 

 R 



R 



M 



R 



R 

 R 



•5 "i 



bo 



cd o 



M 

 M 

 R 



M 



R 

 R 



Lower 

 San Pedro. 



R 

 R 

 R 

 R 

 R 



R 

 R 

 M 

 R 

 R 

 M 



R 

 R 



R 

 R 

 R 



C 

 C 

 R 

 M 



R 

 R 

 R 

 R 

 R 



25 



M 

 R 

 R 



R 



M 



M 

 M 



R 

 R 



Pliocene. 



as 



R 



R 

 R 



R 

 R 



M 



R 

 C 

 C 

 R 



