x CONTENTS. 



The Urinary Bladder, Urethra, and Urogenital Sinus . .40.5 



The Genital Glands . . 4< 



The Germinal Epithelium and Genital Ridge. 4< 



Differentiation of the Genital Glands, . . . 40) 



The Ovary 4Q< 



The Testicle 4i<- 



Determination of Sex 4 J f 



The Ducts of the Genital Glands and the Atrophy of the Meso- 



nephroi 4*< 



In the Female . . ". 4i/ 



Oviduct 4i& 



Uterus and Vagina 4*9 



In the Male 420 



Changes in the Positions of the Genital Glands and the Development 



of their Ligaments 4 2 * 



Descent of the Testicles 4 2 3 



Descent of the Ovaries 4 2 ^ 



The External Genital Organs 4 2 7 



The Development of the Suprarenal Glands 43 C 



The Cortical Substance 43 1 



The Medullary Substance 431 



Anomalies 433 



Practical Suggestions 439 



References for Further Study 441 



CHAPTER XVI. 



THE DEVELOPMENT OF THE INTEGUMENTARY SYSTEM 444 



The Skin 444 



The Nails 446 



The Hair 447 



The Glands of the Skin 449 



The Mammary Glands 449 



Anomalies 451 



Practical Suggestions 453 



References for Further Study 453 



CHAPTER XVII. 



THE NERVOUS SYSTEM 454 



General Considerations 454 



General Plan of the Vertebrate Nervous System 457 



Spinal Cord and Nerves 464 



The Epichordal Segmental Brain and Nerves 466 



The Cerebellum 473 



The Mid-Brain Roof 474 



The Prosencephalon 474 



