Desert Tortoise (Testudo agassizii) Near Its Burrow 



in the Yielding Desert Sand. This Reptile Feeds on 



Plants, and Never Visits Water. 



Photographed by C. L. Camp on Mohave Desert 

 Near Barstow. 



Chuckwalla (Sauromalus ater), a Characteristic Rep- 

 tile of the Lower Sonoran Desert Region of the South- 

 west. West of the Colorado River. It Is Harmless, 

 and Has Been Used for Food by Indians and on Oc- 

 casion Even by White Men. 



Photographed by C. L. Camp on Mohave Desert 

 Near Barstow. 



PLATE XIII 



