ILLUSTRATIONS xv 



FIG. PAGE 



63 Transverse section through middle of glans penis of rani . . 249 



64. Distal end of bull's penis showing glans, c. .... 250 



65. End-bulb in prostate 259 



66. Diagram illustrating innervation of genital organs of male ^ at . 261 



67. Transverse section through rabbit's uterus after ovariotomy . 318 



68. Transverse section through bitch's uterus 9 months after 



ovariotomy . . . . . . . . .319 



69. Section through ovary of rat after transplantation on to peri- 



toneum . . . . . . . . . .321 



70. Section through ovary of rat after transplantat on on to peri- 



toneum - . . .322 



71. Transverse section through normal uterus of rat . . . 323 



72. Transverse section through uterus of rat after ovariotomy . 324 



73. Transverse section through uterus after ovarian transplantation 325 



74. Section through rat's kidney into the tissue of which an ovary 



had been transplanted . . . . . . .327 



75. Part of an early human chorionic villus . . . . .362 



76. Early blastocyst of rabbit 372 



77. Diagram to illustrate the three parts of the wall of the yolk- 



sac (rabbit) .......... 381 



78. Diagram of an opossum embryo and its appendages . . 382 



79. Diagram showing the arrangement of foetal membranes in 



Dasyurus ......... 383 



80. Diagram showing the arrangement of foetal membranes in 



Perameles . ......... 385 



81. Elongated blastocyst of sheep at thirteenth day of pregnancy 386 



82. Transverse section through blastocyst of sheep at twenty- 



fifth day 387 



83. Blastodermic vesicle of rabbit ....... 388 



84. Diagram of blastodermic vesicle of rabbit in longitudinal 



section . ....... 389 



85. Diagram to illustrate foetal membranes of Erinaceus . .391 



86. Hypothetical section of human ovum imbedded in decidua . 393 

 87 Portion of injected chorion of pig ...... 394 



88. Section through wall of uterus and blastocyst of pig at twentieth 



day of pregnancy ........ 395 



89. Diagram representing a stage in the formation of the placenta 



(pig) 396 



90. Section through uterine and embryonic parts of a cotyledon of 



sheep at twentieth day of pregnancy .... 398 



91. Section through base of foetal villus, &c. (sheep) . . . 399 



92. Columnar trophoblast-cells from the base of foetal villus at 



third month of pregnancy (cow) to show phagocytosis . 401 



