CONTENTS 



PAGE 



LIST OF ILLUSTRATIONS xi 



CHAPTER 



I. THE HISTORY OF THE FERTILIZATION PROBLEM . . i 

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



III. THE MORPHOLOGY OF FERTILIZATION 44 



IV. THE PHYSIOLOGY OF THE SPERMATOZOON . . . .91 

 V. THE PHYSIOLOGY OF FERTILIZATION 129 



VI. THE PROBLEM OF SPECIFICITY IN FERTILIZATION. . 184 



VII. THE PROBLEM OF ACTIVATION 227 



INDEX 275 



