PROCEEDINGS 



OF THE 



CALIFORNIA ACADEMY OF SCIENCES 



Fourth Series 



Vol. VIII, No. 6, pp. 181-270, pis. 7-17 October IS, 1918 



VI 



The Garter-Snakes of Western North America 



John Van Denburgh 



Curator, Department of Herpetology 



AND 



Joseph R. Slevin 



Assistant Curator, Department of Herpetology 



PRINTED FROM THE 

 JOHN W. HENDRIE, P-0-B4.HSAX.I0N ENDOWMENT 



DEC 2 6 1918 '^ 





SAN FRANCISCO 



Published by the Academy 



1918 



