CONTENTS. 



GENERAL. 



PAGE 



CHAPTER I. 

 GENERAL SURVEY OF THE ANIMAL KINGDOM, . . i 



CHAPTER II. 

 PHYSIOLOGY, ... . 14 



CHAPTER III. 

 MORPHOLOGY, ... ... 30 



CHAPTER IV. 

 EMBRYOLOGY, ..... 49 



CHAPTER V. 

 PAL/EONTOLOGY, .... .74 



CHAPTER VI. 

 DOCTRINE OF DESCENT, . . . . .81 



