352 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



These specimens include 1333 lizards, 90 snakes, 29 turtles, 39 frogs. 25 

 toads, and 3 salamanders. 



The classification and arrangement of the collection was continued during 

 the year, with the necessary separation, identification, rebottling, labeling 

 and card-cataloguing of the specimens. The collection of lizards is now 

 nearly all classified and arranged and much progress has been made with 

 the snakes. 



Considerable research work has been done during the year. The gopher 

 and garter snakes of the Pacific States have received especial attention 

 and a number of new facts regarding them have been discoverd which 

 will be published later. In this connection we have been enabled, through 

 the courtesy of Dr. Gilbert of Stanford, and Dr. Grinnell of the University 

 of California, to make use of several hundred snakes belonging to those 

 institutions. 



Two papers were published during the year ; one on the reptiles of 

 Guam, and the other concerning the soft-shelled turtle Asfidonectes cali- 

 forniana. 



It is hoped that the field work of the department in its survey of the 

 reptiles of the Pacific States may be continued with increasing vigor during 

 the coming year. Much work along these lines yet remains to be done, 

 especially in Oregon, California and Arizona. 



The number of specimens added during each of the past six years has 

 been about as follows : 



1912 3500 specimens 



1913 2700 



1914 800 



1915 800 



1916 1500 



1917 1600 



Department of Invertebrate Paleontology 

 By Roy E. Dickerson, Curator 



With an increased appropriation for field work, clerical assistance and 

 equipment the department has been able to accomplish some very neces- 

 sary field work in southern California and in Sonoma County. Laboratory 

 studies on the Eocene and Oligocene of Peru, an upper Pleistocene fauna 

 near Tomales Bay, the fauna of Carrizo Creek beds of San Diego County, 

 descriptions of species of Martinez and Tejon Eocene of California and 

 some lacustrine species from the Petaluma lake beds, are now in course of 

 preparation. 



All of the marine shells of the Hemphill conchological collection have 

 been numbered and placed in cabinet cases or exhibited. The gastropods 

 have been systematically arranged in cabinet cases and work upon the 

 pelecypods is progressing. A portion of a large loan collection from the 

 California State Mining Bureau has been arranged and numbered. The 

 type specimens have been segregated. The curator has been very efficiently 

 aided in this work by Mr. John Carlson and Mr. Georges Vorbe. 



New fossils of upper and lower Eocene age from the Simi Hills are 

 being described by the curator. These forms are unusually well preserved 



