Fig. 31. (Left) Eye of the Hog-nosed Snake, showing the round pupil typical of 



the local non-poisonous snakes. 



Fig. 32. (Right) Eye of the Copperhead, showing the elliptical pupil that identifies 



the local poisonous snakes. 



Fig. 33. Typical smooth, or unkeeled, scales. ( Blacksnake). 

 Fig. 34. {Lower) Strongly keeled scales of the Water Snake. 



