738 



SUBJECT INDEX 



of, 16. ; sodium in egg of, ib. ; calcium 

 in egg of, /6. ; magnesium in egg of. Hi. ; 

 iron in egg of, ib. sq. ; phosphorised fats 

 in egg of, 279 ; luteins in egg of, 281 ; 

 phosphorus in egg of, 278, 282 ; 

 livetin in egg of, 283, 286; effect of 

 castration in, 323 sq.. 334 sqq. : frctal 

 intersexuality in, 339 ; ovariotomy in. 

 341 sqq. ; thymectomy in, 380 : fertility 

 in, 627 ; inheritance of fertility in, 

 643 sq. ; sex linked characteristics in, 

 677 ; hermaphroditism in, 689 H,, 693 

 sq. ; intersexuality in, 695 ; effects of 

 castration in, 699 ; effects of ovariotomy 

 in, ib. ; growth of, 706, 708, 711 



Fox, breeding season in, 4, 50 ; period of 

 gestation in, 50 



Fox-hounds, in- breeding in, 216 



France, birth-rate in, 660 ; sex-ratio in, 

 687 



" Free-martin," 689, 694 sq. 



Frog, breeding season in, 18 sqq. ; matura- i 

 tion of ova in, 128 ; polar body in, ib. ; 

 discharge of ova into oviduct in, 136 ; 

 form of spermatozoa in, 169 ; artificial \ 

 impregnation in, 176 ; hybridisation ; 

 in, 210 ; life cycle in, 227 sq. ; partheno- 

 genesis in, 234, 316 ; egg-membrane in, 

 290 ; ranovin in egg of, 291 ; ferment 

 of gonads of, 318 ; internal secretion 

 of testes in, 337 sq. ; transplantation 

 of testes in, ib. ; "summer cells" of, 

 385 ; sex-determination in, 662 sq., 668 ; 

 sex-reversal in, 693 



Fruit-fly, sexual attraction in, 12 



Fundulu-s, chromosomes in, 206 : life 

 cycle in, 227 



Fur seal, cestrous cycle in, 54 



Gfadus aiglefinus, chemistry of spermatozoa 



of, 308 

 Gadus morrhua, chemistry of spermatozoa 



of, 305 

 Galactogogue, 597, 604 ; corpus luteum 



extract as, 621 



Galactophorous sinuses of udder, 586 

 Galeopitheci, placenta of, 409 

 Galeopithecus volans, uterine cycle in, 92 

 Galago agisymbanus, placenta of, 428, 440 

 Galgulus oculatus, sex-determination in, 



673 ; dimorphism of spermatozoa in, 



16. ; number of chromosomes in, ib. 

 Gallus bankiva, fertility in, 628 

 Gametes, assortive mating among, 210, 



214 sq. ; reduction of vitality of, 220 ; 



sex-detepmination by, 671 sq. See also i 



Ova and Spermatozoa 

 Gaseous metabolism, 390 

 Gasteropoda, maturation of ova in, 128 

 Gaur, see Bibos gaurus, 641 ' 

 Gayal, cestrous cycle in, 45. See also i 



Bibos frontalis 



Gazella dorcas, cestrous cycle in, 45 



Gazelle, 259 



Geese, hybridisation in, 641 



" Gewebspilz," of man, 493 



Genera, sterility between, 640 



Generative organs, innervation of, in 

 female, Chapter XII. ; effect of aphro- 

 disias on, 638 



Genito-crural nerve, 270 



Gerbillus hertipes, cestrous cycle in, 37 



Germany, birth-rate in, 660 



Germ-cells, effect of alcohol on, 209 ; 

 effect of lead on, ib. ; effect of X-rays 

 on, ib. effect of external conditions 

 on, 208 sqq. ; effect of soma on, 208 sqq. 

 See also Gametes 



Germinal layers, inversion of, in mouse, 

 468 ; inversion of, in guinea-pig. 473 



Germinal spot, 109. See Nucleolus 



Germinal vesicle, 109. See Nucleus 



Gestation, heat during, 33 n. ; sac of 

 rabbit, 452 ; duration of, 577 sq. ; 

 prolonged, 577 sqq. ; prolonged, in 

 horse, 578 ; prolonged, in cow, ib. ; 

 prolonged, in Dipodillu-s simoni, ib. ; 

 prolonged, in man, t'6. ; prolonged, in 

 Meriones shawi, ib. ; prolonged, in 

 Meriones longifrons, ib. ; in Mus muscu- 

 lus, ib. ; prolonged, in mice, ib. sq. 



Gestation period, 29 sqq. ; in dog, 30 ; 

 in seal, ib. ; in Echidna, 35 ; in 

 Marsupialia, ib. sq. in Marsupial cat, 

 36 ; in Dasyurus viverrinus, ib. ; in 

 Mus decumanus, 37 ; in Mus rattus, 

 ib. ; in Cavia porcellus, ib. sq. ; in 

 cattle, 43 ; in roe-deer, 43 n. sq. ; in 

 camel, 45 ; in walrus, ib. ; in pig, 46, 

 68 n. ; in horse, 46 ; in elephant, 47 ; 

 in dolphin, 48 ; in dog, 50, 442 ; in 

 wolf, 50 ; in fox, ib. ; in Lycaon 

 pictus, ib. ; in cat, 51, 442 ; in wild 

 cat, 52 ; in lion, 53 ; in tiger, ib. ; 

 in puma, ib. ; in bear, ib. ; in ferret, 

 ib. ; in polecat, ib. ; in badger, 54 n. ; 

 in walrus, 55 ; in hedgehog, ib ; in 

 Macacus, 59 ; in Macacus nemestrinus, 

 ib. ; in Cercopithecus cynosurus, ib. ; 

 factors influencing duration of, 68 ; 

 in Southdown sheep, ib. ; in Merino 

 sheep, ib. ; in opossum, 417 sq. ; 

 in Dasyurus, 418 ; in Perameles, 419 ; 

 in rabbit, 456 ; size of litters in relation 

 to, 624 



Giant-cells of mouse, 469 sq. 



Gigantism, 323 



Giraffe, cestrous cycle in, 45 ; penis of, 

 259 ; placenta of, 432 



Glands of Bartholini, 253 



Glands of Duverney, 253 



Glands of Morgagni, 251 



Glands of Skene, 242 



Glans penis, 254, 260 sq. 



Globulins, 286 sq. ; of colostrum, 595, 

 619 



Glucoprotein in white of egg, 287 



