CONTENTS 



LIST OF ILLUSTRATIONS 



CHAPTER 



III. THE MORPHOLOGY OF FERTILIZATION 



IV. THE PHYSIOLOGY OF THE SPERMATOZOON 



V. THE PHYSIOLOGY OF FERTILIZATION 



VI. THE PROBLEM OF SPECIFICITY IN FERTILIZATION, 



VII. THE PROBLEM OF ACTIVATION 



INDEX 



PAGE 



xi 



I. THE HISTORY OF THE FERTILIZATION PROBLEM 



II. THE PLACE OF FERTILIZATION IN THE LIFE-HISTORY . 31 



. 44 



9 1 

 . 129 



. 184 



. 227 



2 75 







54108 



IX 



