INDEX 



167 



Venereal diseases, 144 



Verworx, 7 



Vertebrate animals, hermaphrodit- 

 ism, 124 ; physiological effect of 

 castration, 88 



Vesicles (Graafian follicles), 25 



Vesicnlfe seminales, 20, 38, 41, 92-3> 

 128, 131 : ferment in, 20 ; 

 functions of, 20 ; injection experi- 

 ments, 92 ; secretion of, 20 



Vestibnlum vagina?, 33 



Villi. 62, 70, 72-3 



Vinegar fly, 139 



Virago, 128 



Virgin, hymen in, 39 ; uterus in, 

 30, 74, 80, 81 



Virgin mammals, milk secretion, 

 84 



Visceral arches, 67 



Vital functions, 1, 3 



Vitamines and fertility, 139 



Vitelline duct, 64 



Volvox, 6, 124 



Vomiting in pregnancy, 75 



VORONOFF, 94, 112 



VorticeUa, 6, 124 



Vulva, 33, 42 



w 



Waldeyer, 8 



Wall of vagina, 48 ; of uterus, 72 



Warmth, effect on sexual instinct, 



13 

 " Water-bag," 77 



Wattles of birds after castration, 91 

 Weber, 134 



Weismann, 115-16 



Weismann and Cope, 120 



Welsh sheep, 88 



Westermarck, 13, 57 



Whale, effect of warmth or cold 



on periodicity, 13 

 Williams, 75 

 " Witch's milk," 85 

 Woman, ovarian cysts in, 101 

 Womb, see Uterus 

 Worm, spermatozoa in, 7 



X 



" Xenia," 122 

 ] X-Chromosomes, 125, 127, 133 

 X-ray experiments, 93, 121 



Y-Chromosomes, 125. 133 

 Yolk granules, 8 

 Yolk sac, 62-4, 70-1, 145 

 Yolk stalk, 67 



Zawadowsky, 130 

 Zebra, experiments with, 121 

 Zona pellucida of o\a^im, 60 

 Zone of granulation tissue, 100 

 Zones of proliferation, 87 

 ZSCHOKKE, 108 



Zygote, 3, 10, 132-3 

 Zygotic intersexuality, 134 



