SUBJECT INDEX 



Hypertrophy, of ovary, 357 sq. ; of uterine 



mucosa, 370 



Hypoblast, 412, 414 ; of man, 493 

 Hypogastric nerves, 267 sqq. 

 Hypophysectomy in dog, 383 

 Hypoxanthine, 307 

 Hyrax, yolk-sac in, 421 ; placenta in, 



450 sq. 

 Hysterectomy, 376 sqq. ; in rabbit, 348 ; 



effect of, on ovary, 377 sqq. 

 Hysteria in menopause, 715 



I 



Ibex, cestrous cycle in, 43 sq. 



Ichthulin, 290 sqq. : source of, in ovary, 

 292 



Idioplasm, 690 



Ids, 199, 201 



Immortality of Protozoa, 724 



Implantation cavity, of mouse, 468 sqq. ; 

 of guinea-pig, 472 sqq. ; in man, 493, 

 497 



Impotence, causes of, 644 sq. 



Impregnation, 174 ; artificial, 176 ; in 

 frog, ib. ; in newt, ib. ; in fish, ib. 



Inachus, sex-metabolism in, 691 



In-breeding, effects of, 215 sqq. ; in horses, 

 216 ; in fox-hounds, ib. ; in pigs, 

 ib. ; and fertility, ib. sqq. ; and 

 sterility, ib. sqq. ; in mice, 217 ; in 

 rats, ib. ; in Drosophila ampelophila, 

 ib. ; in maize, ib. ; and homozygosity, 

 ib. sq. ; and abortion, 218 ; in sheep, 

 ib. ; in dogs, ib. sq. ; and virility 

 of spermatozoa, 219 ; and vitality of 

 ova, ib. sq. ; in rabbits, 224 ; in goats, 

 ib. ; effect of, on sterility, 639 ; effect 

 of, on fertility, ib. sq. 



Incubation period, 23 



Indeciduata, placenta of, 427 sqq. 



Indian ink, for vital staining, 466 



Infarct formation, 575 



Infusoria, conjugation in, 205 



Inguinal canal, 164 



Inguinal gland, 253 ; in musk deer, ib. ; 

 in musk rat, ib. ; in hamster, ib. 



Innervation, of female generative organs, 

 Chapter XII. ; of external female 

 generative organs, 560 sq. ; of clitoris, 

 560 ; of vulva, ib. ; of ovaries, 561 ; 

 of uterus, ib. sqq. ; of vagina, ib. 



Impotence, phosphorus as cure for, 638 ; 

 strychnine as cure for, ib. ; yohimbine 

 as cure for, ib. 



Insecta, fertilisation in, 182 ; polyspermy 

 in, 183 ; cholesterin in eggs of, 293 ; 

 phosphorised fats in eggs of, 293 ; 

 longevity in, 721 



Jnsectivora, oestrous cycle in, 55 sq. ; 

 uterine cycle in, 92 ; placenta of, 408, 

 410, 476 sqq., 509 ; yolk-sac in, 424 sq. 



Insemination by artificial means, 131, 174 

 sqq. ; in dog, 174 sq., 649 ; method of, 



174 sq., 648 sqq. ; in horse, 175, 178, 648 

 sq. ; in donkey, 175 ; in cattle, 175, 

 649 ; in rabbit, 176 ; in guinea-pig, ib. ; 

 in mouse, 176, 649 ; in man, 176, 

 647 



Intersexuality, in fowl, 339 ; in Ruticilla 

 phoenicurus, 341 ; in pigeon, 686 ; in 

 Hermit crab, 691 ; in Ophryotrocha 

 puerilis, 692 ; in pigeon, 694 ; in 

 Lymantria crosses, ib. ; in fowl, 695 



Interstitial cells, 155 sq., 339 ; of ovary, 

 119, 142 n., 144 .; 145, 147, 346 sq., 

 386 n. ; origin of, in mole, 120 n. ; 

 origin of, in stoat, ib. ; origin of, in 

 dog, ib. ; of testes, 160 sq., 163, 335 sq. ; 

 of ovary, during gestation, 376 



Interstitial placenta! attachment, 442 



Intervillous spaces of placenta, 395 



Intra-uterine growth, 703 



Intromittent sac of penis, 258 



Invertebrata, chemistry of ova of, 292 sqq. 



Involution, of vagina, 582 ; of cervix uteri, 

 ib. ; of uterus, 581 



Ischio-cavernosus muscles, 254, 262, 266, 

 268 



Iron, in egg of fowl, 278 sq. ; source of, 

 in ova, 292 ; in spermatozoa, 311 ; as 

 catalyst, 315 ; source of foetal, 434, 

 547 sq. ; metabolism of, in placenta, 

 457 sq., 505 sq. ; granules of, in placenta, 

 459 ; in foetus of man, 547 ; in preg- 

 nancy, ib. sqq. ; in placenta, ib. ; in 

 foetal organs, 505 sq., 548 ; and abor- 

 tion, ib. ; in milk, 594 ; in ash of pup, 

 595 ; in milk of dog, ib. ; in serum of 

 dog, ib. 



Irritants. of penis, 258 



Jaguar, fertility of hybrid with lion, 641 

 Jelly-fish, form of spermatozoa in, 169 

 Juniper, abortion caused by, 659 



K 



Kangaroo, cestrous cycle in, 36 



Karyogen, 311 



Keratin, composition of, 288 ; in eggs of 

 lower Vertebrates, 289 sqq. ; in eggs of 

 herring, 290 ; in eggs of Bombyx, 292 



Kidney during senescence, 718 



Labia major, 74 



Labia minora, 74 



Labour, duration of, 568 



" Labour pains," 565 ; pressure of, 566 



Labyrinth of placenta, 447 



Lacertilia, yolk-sac of, 415 



Lactalbumen in milk, 594 



