REPTILES 



37* 



Photograph by E. R. Sanborn, .V. Y. Zool. Soc. 

 FIG. 148. Gila monster (Helodcrma suspcctum). 



Photograph by E. K. Sanborn. N. Y . Zool. Soc. 

 FIG. i4Q. Iguana (Iguana tubcrculali) , a large lizard common in tropical America. 



of the pigment in the chromatophores ; it may be 

 brought near the surface, giving a dark color, or with- 

 drawn from sight, when the skin appears pale or white. 

 Chameleons have enormously long tongues, which are 

 thrust out to capture insects. Lizards have consider- 

 able power of renewing lost parts, particularly the tail. 

 A species found in New Mexico has a bright blue tail, 

 and it can hardly be doubted that this serves to attract 



