AGAMAS. 



109 



Genus Phrynosoma (Wiegm.). 



In this singular genus, whose orbicular form 

 scarcely recals the idea of a lizard, the tail is 

 flattened, and shorter than the body ; the whole 

 form greatly depressed; the body nearly globular ; 

 the scales on the belly, limbs, and tail, are small 

 and overlapping ; those of the upper parts rather 

 larger, and interspersed with longitudinal rows of 

 spines ; the hind head is set with large spines. 





TAPAYAXIN. 



The best known species is the Tapayaxin 

 of Mexico {Phrynosoma orhicidare^ Wagl.), some- 

 times called the Spinous Toad. *^ The extra- 

 ordinary figure of this reptile, approaching almost 



