Plate 86 



POISONOUS SNAKES 



SOUTH AMERICAN RATTLESNAKE Crotalus 



durissus. 

 Distribution: Mexico, Central America and South Am. gen- 

 erally. 



Reaches a length of six feet. 



GRAY RATTLESNAKE Crotalus pulvis. 



Distribution: Central America. 

 The type specimen is slightly over a yard long. 



