CONTENTS. 



GENERAL. 

 CHAITKR I. 



PAGE 



GENERAL SURVEY OF THE ANIMAL KINGDOM . i 



CHAPTER IT. 

 PHYSIOLOGY . . 20 



CHAPTER III. 



MORPHOLOGY . 34 



CHAPTER IV. 

 EMBRYOLOGY . . 5 2 



CHAPTER V. 

 PALEONTOLOGY . 



CHAPTER VI. 

 DOCTRINE OF DESCENT . . .84 



