{Agkistrodon, CrotaluSj Sistrurus), snakes of this 

 country belong to that group. 



SAURiA (Suborder) Iguinidae (Family) 



Anolis (Genus) 



36. Anolis carolinensis Voigt. 



AMERICAN ''CHAMELEON". 



This form, common in the Southeastern U. S., 



is totally unrelated to the true Chameleons of the 



Old World, and should be called the "Anolis". 



The color changes for which it is so widely known 



are not governed by the material upon which it is 



placed, but by temperature, humidity, and the 



mood of the animal. 



Ctenosaura (Genus). 

 37. Ctenosaura hemilopha Cope. 

 SAN LUCAN SPINY-TAILED IGUANA. 

 This large lizard is very common in parts of 

 the southern portion of the Lower California Pen- 

 insula, where it is found among rocks or in trees. 

 It eats vegetable food by preference, but is said to 

 eat crabs when other food is scarce. Its flesh is 

 eaten by the natives, and its spiny tail is used by 

 it as a means of defence. 



Crotaphytus (Genus) 

 38. Crotaphytus collaris (Say). 

 COLLARED LIZARD. 

 A handsome species, found from Arkansas 

 south to middle Texas and west to Eastern New 

 Mexico. Usually found in high altitudes, and is 

 a very agile and graceful form. Entirely insectivo- 

 rous. 



