92 



CLASS-BOOK OF ZOOLOGY. 



3d Order. — Tortoises. 



Fig. 23. 



The Turtle. — (Testudo radiata.) 

 Ath. Order. — Frogs 



Fig. 24. 



The Common Toad. — (Bufo vulgaris.) 



SECTION XXI. 



1st Order — Snakes: (Ophidia.) 



§ 376. Snakes, (Ophidia,) are those Reptiles which have 

 the whole body covered with scales, and which have no 

 legs. 



§ 377. The rapid motion of Snakes is effected by their 

 vertebra, their scales and the elasticity of their body. 



