PLATE VIII 

 Amphibia and Reptilia of Colorado 



Fig. j8, Crotalus confiuentus. Prairie Rattlesnake (page 109). 



Fig. 39. — Crotalus conjUtentus. Prairie Rattlesnake. Skull showing fangs (page iog). 



Fig. 40. — Crotalus conjlucntus. Prairie Rattlesnake. Showing fangsheaths (page iog). 



