CONTENTS 



PAGE 



List of Illustrations ^^ 



CHAPTER 



I. The History of the Fertilization Problem . . i 



II. The Place of Fertilization in the Life-History . 31 



HI. 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. . 1S4 



VII. The Problem of Activation 227 



Index . . . ■ -75 



IX 



