Xll CONTENTS. 



PAGE 



IMPREGNATION OF THE OVUM, 573 



Male Sexual Functions, 573 



DEVELOPMENT, 578 



Changes of the Ovum previous to the Formation of the 



Embryo, 578 



Changes of the Ovum within the Uterus, .... 581 



The Umbilical Vesicle, 582 



The Amnion and Allantois, ........ 585 



The Chorion, 588 



Changes of the Mucous Membrane of the Uterus and For- 

 mation of the Placenta, 589 



DEVELOPMENT OF ORGANS, 593 



Development of the Vertebral Column and Cranium, . 594 



Development of the Face and Visceral Arches, . . . 595 



Development of the Extremities, ..... 596 



Development of the Vascular System, .... 597 

 Circulation of Blood in the Foetus, . . . . .601 



Development of the Nervous System, ..... 603 



Development of the Organs of Sense, 603 



Development of the Alimentary Canal, .... 606 

 Development of the Respiratory Apparatus, . . . 608 

 The Wolffian Bodies, Urinary Apparatus, and Sexual Or- 

 gans, 609 



THE MAMMARY GLANDS, 613 



LIST OF WORKS REFERRED TO, 617 



INDEX, . 625 



