166 STORY OF THE REPTILES 



Of ,course chameleons proper form a family of 

 lizards, but they differ so much that they have been 

 put into a separate suborder by some students. There 

 are many different kinds ; but all may be known from 

 other lizards at a glance by their circular eyes and 

 the bunching of the five toes into two fingers or toes 

 opposing three others — there being no such eyes or 

 feet anywhere in Nature. 



The families of the lizards found in the North- 

 eastern United States may be quickly determined by 

 the following little key — if the specimen is in hand : 



A. Limbs practically absent (in America). Tongue not snakelike. 



Anguid(B, Glass- Snake family. 

 AA. Limbs present. 



B. Tongue thick, not notched or scaly. Iguanidm. 



BB. Tongue thin, scaly, slightly notched. 



Shinhs or ScinoidcB. 

 BBB. Tongue broad, wrinkled or scaly, but ending in two 

 sharp points. Teiidce. 



