740 



SUBJECT INDEX 



Hare, size of litter in, 625 



Harp seal, cestrous cycle in, 54 



Hawk, sterility in, 629 ; in captivity, 630 



Heart, during pregnancy in rat, 557 ; 



during senescence, 718 

 Heat period, 33, 562 ; during gestation, 

 33 n. ; relation of, to menstruation, 

 107 ; factors determining, 358 sqq. ; 

 absence of, after ovariotomy, 361 ; 

 after ovarian transplantation, 361 ; 

 ovarian extract causing, 362 ; factors 

 determining, in dog, 364 

 Heat-spots of penis, 254 

 Hedgehog, breeding season in, 55 ; period 

 of gestation in, ib. ; vesiculae seminales 

 in, ib. n. ; interstitial cells of testes in, 

 163 ; vesicula seminalis of, 244 sq. ; 

 corpus luteum in, 365 ; placenta of, 

 409, 476 sqq. ; yolk-sac in, 424 ; 

 zona pellucida of, 476 ; blastocyst of, 

 ib. ; trophoblast of, ib. sqq. ; diplo- 

 trophoblast of, ib. ; trophospongia of, 

 478 sq. ; trophosphere of, 478 ; ovum 

 of, ib. ; deciduofracts of, 479, 481 ; 

 omphaloidean region in, 480 ; allan- 

 toidean trophoblast of, ib. ; allan- 

 toidean trophospongia of, 481 

 Helicine arteries of penis, 255 

 Hemiptera, longevity in, 721 

 Hemitragus jeruldicus, cestrous cycle in, 



43 sq. 

 Heredity, and fertilisation, 197 sq. ; and 



chromosomes, 199, 204 sqq. 

 Hermaphroditism, 688 sqq. ; artificial, in 

 caterpillars, 325 ; complete, 688 ; in 

 sponges, ib. ; in Ccelenterates, ib. ; 

 in Mollusca, ib. ; in Crustacea, ib. ; 

 in Mammalia, 689 ; partial, ib. ; in fowl, 

 ib. n. ; in Rhizocephala, 692 ; in fowl, 

 693 ; in pheasant, 694 ; in pig, 695 ; 

 in goat, ib. 

 Hermit crab, parasitic castration in, 326 ; 



intersexuality in, 691 

 Heron, longevity in, 722 

 Herring, 17 ; phosphorised fats in eggs of, 

 290 ; keratin in eggs of, ib. ; clupeovin 

 in eggs of, ib. sq. ; cholesterin in eggs of, 

 290 



Heteroplastic graft of ovary, 350 sqq. 

 Heterozygote, 674 

 Heterozygosis, 641 

 Hexoses, 282 

 Hibernation, 21 

 Hippomanes, 413, 437 

 Hippopotamus, oestrous cycle in, 46 

 Histamine, 392 

 Histidine, 288, 304, 309 

 Histone, 305 sq. 



Histriboddla, fertilisation in, 184 

 Holophytum, breeding season of, 8 

 Homoplastic graft of ovary, 351 sqq. 

 Homosexuality, 691 

 Homozygote, 673 



Homozygosity, in- breeding and, 217 sq. 

 Hormone of ovary, 577 



Horse, heat during gestation in, 33 n. ; 

 cestrous cycle in, 46 sq. ; period of 

 gestation in, 46 ; ovulation in, 131 ; 

 artificial insemination in, 175, 178, 

 648 sq. ; sterility in, 216 ; in-breeding 

 in, ib. ; rejuvenescence in, 223 sq. ; 

 ampulla of Henle in, 240 ; composition 

 of semen in, 297 ; effects of castration 

 in, 325 ; foetal membranes of, 413 ; 

 yolk-sac in, 420 ; placenta of, 428 sq. ; 

 blastodermic vesicle of, 429 ; tropho- 

 blast of, ib. source of foetal iron in, 

 434 ; parturition in, 568 sq. ; pro- 

 longed gestation in, 578 ; growth of 

 mammary gland in, 606 ; sterility due 

 to overfeeding in, 631 ; sterility of 

 hybrid with zebra, 642 ; inheritance of 

 fertility in, 643 ; causes of sterility in, 

 646 ; abortion in, 653 sq. foetal 

 atrophy in, 656 ; sterility in, 658 ; 

 dimorphism of spermatozoa in, 678 n. ; 

 number of chromosomes in, ib. ; 

 growth of, 706, 710 ; puberty in, 714 ; 

 menopause in, 717 ; senescence in, 721 ; 

 longevity in, 722 

 Horse-breeding, 216 



Hybridisation, 199 ; sterility caused by, 

 210 ; in frog, ib. ; in Triton alpestris, 

 ib. in Pelodytes, ib. ; in Bufo, ib. ; of 

 cattle and bison, 211 ; in Strongylo- 

 centrotus, 212 sq. ; in Echinus acutus, 

 211 sq. ; in Echinus miliaris, 211 sqq. ; 

 in Echinus esculentus, 211 sq. ; in 

 Aster ias, 212 ; in Myiilus, 213 ; in 

 fishes, ib. ; in Echinoids, 219; of lion 

 with jaguar, 641 ; in geese, ib. ; in 

 Canis, ib. ; of Bos taurus and Bos 

 indicus, ib. ; of Bibos grunnicus and 

 Bibos gaurus, ib. ; of Bibos frontalis 

 and Bison americanus, 641 ; of cow 

 and Bison bonasus, 642 ; of horse 

 and zebra, ib.; of bee, 666. See also 

 Mendelism 

 Hydatina, sex-determination in, 667 ; 



influence of food on, 668 

 Hydatina senta, sex-determination in, 668 ; 

 parthenogenesis in, 670 ; dimorphism 

 of ova in, 679 



Hydrsemia of pregnancy, 556 

 Hydra orientalis, reproduction of, 6 sq 

 Hydroids, alternation of generations in 



marine, 7 



Hydrometra during menopause, 715 

 Hydrops graviditatis, 552 

 Hyena crocuta, clitoris in, 261 sq. 

 Hylomys, see Malayan hedgehog 

 Hymen, 71 sq., 582 



Hymenoptera, sex-determination in, 667 

 Hypercholesterinaemia in maternal or- 

 ganism, 542 

 Hyperglycaemia, during pregnancy, 462 ; 



effect of, on glucose metabolism, 463 

 Hyperlactation in man, 600 

 Hypernephromata, 385 

 Hyperpituitarism, 383 sq. 



