IV 



CONTENTS OF PART I. 



PAGE 



Formation of the Anus . . . . 108 

 FORMATION OF THE GLANDS OF THE ALI- 



MENTAIIY CANAL .... 109 



The Lungs ...... 109 



The Trachea and Larynx . . . 1 10 

 The Thyroid Body . . . . . no 



The Thynms 1 1 1 



The Liver. . . . . . . 112 



The Pancreas . . . . 1 1 3 



Recent Literature of the development of 



the Alimentary Canal and Glands . . 113 

 DEVELOPMENT OF THE URINARY AND 



GENERATIVE ORGANS . . .115 

 The Wolffian duct and body . . .117 

 Supra-renal Capsules . . . .120 

 The permanent Kidneys . . 122 



The Urinary Bladder . . . .122 

 The Miillerian duct . . , . . 122 

 The Germinal Epithelium . . .124 

 Development of the Ovary. . . . 124 



Of the Testicles 125 



Descent of the Testicles . . . . 126 

 The External Organs . . . .127 

 Table of Generative Organs . . . 130 

 Recent Literature of the development of 



the Urinary and Generative Organs . 132 



FORMATION OF THE VASCULAR SYSTEM . 134 



Development of the Heart . . .134 



Peculiarities of the Fostal Heart . . 146 



Development of the principal Arteries . 146 



PAGE 



Destination of the fourth and fifth Arte- 

 rial Arches. . . . . .150 



Development of the principal Veins. . 151 

 Peculiarities of the f< etal ( >rgans of Circu- 

 lation . . . . . -155 



The Foramen Ovale . . . . . 155 



The Eustachian Valve . . . . 155 



The Ductus Arteriosus . . . . 156 



The Umbilical Vessels . . . . 1 56 



Course of the blood in the Feet us . .156 

 Changes in the Circulation at Birth . 157 

 The Lymphatic System . . . . 157 



Recent Literature of the development of 

 the Vascular System . . . .158 



DEVELOPMENT OF THE SEROUS CAVITIES 



AND OF THE MUSCLES AND SKELETON 159 

 The Serous Cavities . . . .159 



Development of the Muscles . . . 159 

 Formation of the head Muscles and evi- 

 dences of head segmentation . . .161 

 Development of the Vertebral Column . 162 

 Ribs and Sternum . . . . . 163 



The Limbs 163 



The Cranium . . . . . . 165 



Formation of the visceral skeleton of the 

 Head ; cartilaginous bars of the visceral 



arches 166 



Formation of the Auditory Ossicles . .167 

 Recent Literature of the development of the 

 Serous Cavities, Muscles, and Skeleton 169 



