CONTENTS. 



CHAPTER I. 

 The Vital Vortex ...Page 1 



CHAPTER II. 



Metamorphosis Generally — Definitions . . . 



CHAPTER III. 



15 



CHAPTER IV. 



Transformations which the Mammal undergoes within 



the Egg— Cell Theory 26 



CHAPTER V. 



Transformations which Mammals undergo after they have 



left the Egff 42 



