Oc. PAPERS, CAI.. ACAD. Set., VOL. X 



[VAN DENBURCH] 



PLATE 101 



A. 1. 



Fu,. I. Cr'italm conflutniUf, Prairie Rattlesnake 

 Section of skin of specimen collected at Cave Creek, Maricopa County, Arizona, 1910. 



Fu;. 2. Crotalui ortganus, Pacific Rattlesnake 



Sfctiun (if skin of specimen collected on Mount Lemmon, Santa Catalina Mountains. Pima 



County. Arizona. June. 1912. 



