< V. 1'u'KRS, CAJ.. AC-AD. Sci., Vol.. X 



| VAN DENRUKCH] 



Pl.ATK 100 



FK.. I . Crotii! n.< atr'ix. Desert Diamond Rattlesnake 

 Si-eiion of skin of specimen collected near Tucson. Pima County. Arizona. April. 1913. 



]-'n.. 2. Cr'/tiilns lin'jiensis, San Lucan Diamond Rattlesnake 

 Sfdioii of skin of spi'Hnirn collccird at San Jose del Culio. Lower California. Mexii'o. 



