CONTENTS OF VOLUME VII. 



PLATES 1-38. 



PAGE 



Title-page i 



Contents iii 



Archaeological Notes on Western Washington and Adjacent British Co 

 lumbia 1 



By Albert B. Reagan. 



(Published July 18, 1917) 



Concerning the Origin of the Soft-shelled Turtle, Aspidonectes californi- 



ana Rivers 33 



By John Van Denburgh. 



(Published July 23, 1917) 



Notes on the Herpetology of Guam, Mariana Islands 37 



By John Van Denburgh. 

 (Published July 23, 1917) 



Stratigraphic and Faunal Relations of the Martinez to the Chico and 



Tejon of Southern California 41 



By Clarence A. Waring. 



(Published July 30, 1917) 



The Fauna of a Medial Tertiary Formation and the Associated Horizons 



of Northeastern Mexico 125 



By Roy E. Dickerson and William S. W. Kew. 



(Published July 30, 1917) 



Climate and its Influence upon the Oligocene Faunas of the Pacific Coast, 

 with Descriptions of some new Species from the Molopophorus lin- 



colnensis Zone 157 



By Roy E. Dickerson. 

 (Published July 30, 1917) 



Climatic Zones of Martinez Eocene Time 193 



By Roy E. Dickerson. 

 (Published July 30, 1917) 



Ancient Panama Canals 197 



By Roy E. Dickerson. 

 (Published July 30, 1917) 



Geology of a Portion of the McKittrick District, a typical Example of the 

 West Side San Joaquin Valley Oil Fields, and a Correlation of the 



Oil Sands of the West Side Fields 207 



By G. C. Gester. 



(Published July 31, 1917) 



Notes on West American Chitons 1 229 



By S. Stillman Berry. 



(Published September 1, 1917) 



Report upon a Collection of Hemiptera made by Walter M. Giffard in 



1916 and 1917, chiefly in California 249 



By Edward P. Van Duzee. 



(Published December 31, 1917) 



Report of the President of the Academy for the Year 1917 319 



By C. E. Grunsky. 

 (Published June 15, 1918) 



Report of the Director of the Museum for the Year 1917 331 



By Barton Warren Evermann. 

 (Published June 15, 1918) 



Index 365 



Nov. 29, 1918 



