738 



SUBJECT INDEX 



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

 in egg of, ib. ; magnesium in egg of, ib. ; 

 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. ; fostal 

 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 n., 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- 

 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 



Fundulus, chromosomes in, 206 ; life 

 cycle in, 227 



Fur seal, cestrous cycle in, 54 



Gadus 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, 



ib. ; number of chromosomes in, ib. 

 Gallus bankiva, fertility in, 628 

 Gametes, assertive mating among, 210, 



214 sq. ; reduction of vitality of, 220 ; 



sex-determination by, 671 sq. See also 



Ova and Spermatozoa 

 Gaseous metabolism, 390 

 Gasteropoda, maturation of ova in, 128 

 Gaur, see Bibos gaurus, 641 

 Gayal, cestrous cycle in, 45. See also 



Bibos frontalis 



Gazdlu 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 re. ; sac of 

 rabbit, 452 ; duration of, 577 sq. ; 

 prolonged, 577 sqq. ; prolonged, in 

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

 prolonged, in Dipodillus simoni, ib. ; 

 prolonged, in man, ib. ; 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 nemesfrinus, 

 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 



