166 STORY OF THE REPTILES 



Of course chameleons proper form a family of 

 lizards, but tliej differ so much that thej 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 lingers or toes 

 opposing three others — there being no such eyes or 

 feet anywhere in Nature. 



The families of the lizards found in the ]^orth- 

 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. 



AnguidcB, Glass- Snake family. 

 AA. Limbs present. 



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



BB. Tongue thin, scaly, slightly notched. 



• Shinlis or Scincidce. 



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

 sharp points. Teiidce. 



