XXXU CONTENTS OF VOL. IL 



PART IV. 



CLASSIFICATION OF ANIMALS. 

 Divided into Vertebral and Invertebral. 



I. 

 VERTEBRATA. 



Page- 

 Character. Description, l6l 



I. With Warm Blood. 

 QUADRUPEDS. 



I. MAMMALIA, 

 Structure of the teeth. Ivory, enamel, cement. Mode 



of formation. Different forms of teeth. 165 



1. PLACENTABIA. 



PEDATA. 

 UNGUICULATA. 



a. Furnished with tusks. 



1. Thumbs fitted to act in opposition to the fingers. 



Bimana. Man, 171|. 



Quadrumana. Simiadae. Limuridae. 172 



2. Thumbs incapable of acting in opposition to the 

 fingers. 



Cheiroptera, 175 



Ferae. 



Hind legs developed for walking. 

 Plantigrada. 



