xiv CONTENTS. 



PAGE 



THE SENSE OF HEARING . . . . . . . . 672 



Anatomy of the Organ of Hearing . . . . . . ib. 



Physiology of Hearing . . . . . . . . 680 



Functions of the External Ear .. .. .. 68 r 



Functions of the Middle Ear ; the Tympanum, Ossicula, 



and Fenestrse . . . . . . . . . . 684 



Functions of the Internal Ear . . . . . . 690 



Sensibility of the Auditory Nerve . . . . . . 693 



THE SENSE OF TASTE . . . . . . . . 698 



THE SENSE OF TOUCH . . . . . . . . 707 



CHAPTER XX. 



GENERATION AND DEVELOPMENT . . . . . . . . 714 



Generative Organs of the Female . . . . . . 715 



Unimpregnated Ovum .. .. .. .. 719 



Discharge of the Ovum . . . . . . . . 724 



Corpus Luteum . . . . . . . . . . 728 



IMPREGNATION OF THE OVUM . . . . . . . . 732 



Male Sexual Functions . . . . . . . . ib. 



DEVELOPMENT . . . . . . . . . . 740 



Changes of the Ovum previous to the Formation of the 



Embryo.. .. .. .. .. .. ib. 



Changes of the Ovum within the Uterus . . . . 743 



The Umbilical Vesicle . . . . . . . . 746 



The Amnion and Allantois . . . . . . . . 748 



The Chorion . . . . . . . . . . 752 



Changes of the Mucous Membrane of the Uterus and 



Formation of the Placenta . . . . . . . . 754 



DEVELOPMENT OF ORGANS . . . . . . . . 760 



Development of the Vertebral Column and Cranium . . ib- 



Development of the Face and Visceral Arches . . . . 762 



Development of the Extremities . . . . . . 764 



Development of the Vascular System . . . . . . 765 



Circulation of Blood in the Foetus . . . . . . 769 



Development of the Nervous System . . . . . . 772 



Development of the Organs of Sense . . . . . . ib. 



Development of the Alimentary Canal . . . . . . 775 



Development of the Respiratory Apparatus . . . . 778 



The Wolffian Bodies, Urinary Apparatus, and Sexual Organs 779 



THE MAMMARY GLANDS . . . . . . . . 784 



INDEX . . . . . . . . . . . . 787 



LIST OF WORKS REFERRED TO . . . . . . . . 827 



