VERTEBRATA. 



ALLIGATOR (Crocodilus Lutius\ AND HAVVKSBILL TURTLE (Clelonia 

 Imbricata). 



by which they creep, climb, walk, run, leap, and 

 even fly."* 



The distinguishing characteristics of the Reptiles 

 are as follow. The whole of the blood which passes 

 through the heart does not pass through the lungs, 

 but only a portion of it, varying in amount in the 

 different genera, so that much less of heat is commu- 

 nicated to it, and the animal is proportionally defi- 



* Griffith. 



