The Rkptili: Uouk 



I'LATE CXXX 



1 Crotalus alrox. 



2 Crotalus oregoniis. 



3 Crotalus confiuentus. 



NORTH AMERICAN' RATTLESNAKES 

 4 C-otalns molossus. 

 ^ Crotahts adamantens. 

 6 Croialus pried. 





7 Crotalus atrox C'sculuhtns"). 



8 Crotalus horridus. 

 Crotalus lepidus. 



