xiv CONTENTS. 



CHAPTER XXIII. 



CHORDA TA {continued). 

 Lepus, as a Type of Mammalia 



382 



CHAPTER XXIV. 



GENERAL FEATURES OF CHORD AT A. 



Phylum Chordata 

 Sub-Phylum Artriozoa ... 

 Sub -Phylum Vertebrata 

 General P'eatures of Vertebrata 



Nervous System ... 



Sense-organs 



Skeletal System ... 



Blood-vascular System 



Alimentary System 



Urogenital System 



Development 



CHAPTER XXV. 



CLASSES OF VERTEBRATA. 



Cyclostomata 

 Pisces 



Amphibia ... 

 Reptilia . . . 

 Aves 



CHAPTER XXVr. 



GENERAL FEATURES OF MAMMALIA, 



Skin 



Hair 



Teeth 



Brain and Nervous System 

 Circulatory System 

 Urogenital System 

 Skeleton ... 

 Development 



