ILLUSTRATIONS xv 



FIG. PAGE 



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



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



65. End-bulb in prostate . . ._ 259 



66. Diagram illustrating inner vation of genital organs of male cat . 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 



