Fusion of Male Pro-nucleus and Female Pro-nucleus to form the Segmentation Nucleus of the Fertilized Ovum 306 58. Passage of Spermatozoon through the Zona Pellucida of the Ovum of Asterakanthion 307 59. Ovum of Scorpæna Scrofa Thirty-five Minutes after Fertilization 307 60. Male Pro-nucleus and Female Pro-nucleus in Fertilized Ovum of Frog, prior to the Formation of the Segmentation Nucleus 307 61. a. b. c. Prostatic calculi from normal semen, d. Spermatozoa. e. Large and small cells, some containing granules, as morphological elements of semen. f. Spermatozoon distorted by imbibition of water. g. Crystals (after Bizzozero) 311 62. Normal Semen 311 63. Semen consisting chiefly of sperm-crystals, cylindrical epithelium, and small granules exhibiting molecular movement—but containing _no_ spermatozoa 315 64. Oligozoöspermia. a. Living Spermatozoa, b. Dead Spermatozoa, c. Pus Corpuscles, d. Erythrocyte, e. Seminal granules 317 65. Septate Hymen, the septum having a tendinous consistency 324 66. 326 67. Lipoma of the Right labium majus, including the Vaginal Inlet 328 68. “Hottentot Apron” in an adult Woman, hanging down between the thighs (after Zweifel) 329 69. Elephantiasis of the Labia Majora 330 70. Congenital Atrophy of the Uterus (after Virchow), oi, Ostium internum; oe, Ostium externum 500 71. 500 72. Normal Shape of the Portio Vaginalis 503 73. Conoidal Shape of the Portio Vaginalis 503 74. “Apron-Shaped” Vaginal Portion, a. Greatly elongated anterior lip; b. Shorter posterior lip of the cervix 504 75. “Beak-Shaped” Vaginal Portion. Posterior aspect 504 76. Simple Hypertrophy of the Portio Vaginalis, which projected from the Vulva 506 77. Elongated Cervix, bent upwards 506 78. Cervical Polypus, originating from an Ovulum Nabothi 510 79. Ectropium in a Case of Bilateral Laceration of the Cervix (after A. Martin) 514 80. Anteflexio Uteri (after A. Martin) 518 81. Retroflexio Uteri (after A. Martin) 520 82. Mucus from the Cervical Canal, taken one hour after sexual intercourse, from a woman suffering from chronic endometritis. Among the epithelial cells, pus cells, and