306 A COURSE ON ZOOLOGY. 



\ - ',- . 



and mice, etc., as well as frogs and toads. Their bites 

 are not at all dangerous. 



FIG. 260. 



PYTHON (Python sebx/ swallowing a bird. 

 FIG. 261. 



RATTLESNAKE (Crotalus horridus) in act of striking. 



The most dreaded of our venomous serpents are the 

 species of crotalus or rattlesnake. In these the end of 

 the tail carries a curious apparatus, consisting of a num- 



