THE REPTILE BOOK 



PLATE XCIX 



Largest of the North American serpents. 



COMMON BULL SNAKE, Piluophis sayi 

 Of economic value, as it prevs largely upon rodents. 



Found in the Plains Region and the West 



PACIFIC BULL SNAKE, Pititophis calender 



Distinctly different from the two preceding species in the smaller, close-set blotches. Also ot smaller size, 

 southern portion of the Pacific Region. Often called the Gopher Snake 



Common in the 



