756 



SUBJECT INDEX 



Superpurgation as cause of abortion, 654 



Suprarenal gland, in rabbit, 385 ; cor- 

 relation of, with sexual organs, ib. sq. ; 

 effect of castration on, 386 



Swan, longevity in, 722 



Sweat glands, 587 



Sweden, sex-ratio in, 687 , 



Swift, breeding season in, 23 



Swiftlet, see Collocalia 



" Sympexions ? ' of Robin, 298 



Symplasma, 418, 445 ; in rabbit, 457 ; in 

 dog, ib. : in mouse, 467 ; in guinea-pig, 

 473 ; in man, 502 



Synapsis in Lygceus bicrucis, 673 



Synaptenic stage of otigenesis, 116 sq., 155 



Syncytium, 397 sq. ; striated border of, 

 397 sq. ; function of, 398 sq. ; origin of, 

 402 ; of cat, 444 sq. ; of dog, ib. ; of 

 man, 494 sq., 502 



Syphilis as cause of sterility, 645 



Tadpoles, effect of pineal extract on, 384 

 Talceporia tubulosa, sex-determination in, 



671 sq. ; dimorphism of ova of, 672 

 Talpa, clitoris in, 261 

 Tamandua, placenta of, 442 

 Tanager, phenomena associated with 



breeding in, 27 

 Tarsius, formation of corpus luteum in, 



139, 145; "Haftstiel" of, 423; 



placenta of, 440 ; placental blood 



formation in, 518 : puerperium in, 



584 

 Tarsius spectrum, cestrous cycle in, 56 ; 



menstrual cycle in, 91 ; ovulation and 



menstruation in, 132 

 " Tata-eggwhite " in white of egg, 287 

 Taurin, 551 



Tautogolabrus, life cycle in, 227 

 Teat, 587 ; of Carnivora, 587 ; of Ungu- 



lata, ib. ; of man, ib. ; of Primates, 



ib. ; of Rodents, ib. ; of Marsupials, 



ib. ; of Cetacea, ib. ; size of litter in 



relation to number of, 624 

 Telegony, 207 sq. ; in Lord Morton's 



quagga, 208 : experiments on, ib. 

 Teleosts, breeding season in, 15 ; corpus 



luteum in, 146 



Temperature in puerperium, 583 

 Temporal gland of elephant, 253 

 Tenrec, see Centetes ecaudatus 

 Tenthredinidae, 126 n. 

 Tergipes, breeding season in, 14 

 Termites, sex-determination in, 665 

 Testis, Chapter V., passim ; structure of, 



159 sqq. ; tunica vaginalis of, 159 ; 



mediastinum of, ib. sq. ; seminiferous 



tubules of, 160 ; reta testis, ib. ; 



interstitial cells of, ib. sq., 163, 335 sq, ; 



tunica albuginea of, ib., 161 ; descent 



of, 164 n., 165 ; correlation of male 



characters with, 320 sqq. ; and 



secondary sexual characters, 321 sqq. ; 

 interstitial cells of, in guinea-pig, 330 : 

 effect of Rontgen rays on, ib. ; of 

 woodchuck, 331 ; transplantation of, ib. 

 sqq. ; compensating hypertrophy in, 

 338 sq. ; relation of thymus to, ^79 ; 

 conclusions regarding internal secretion 

 of, 386 sqq, 

 Tetanus uteri, 563 

 Tetany, 385 



Tetheh'n as prolonging life, 712 

 Telraceros, placenta of, 432 

 Tetrad, 125 n. ' 

 Tetronerythrin, 294 sq. 

 Theca externa, 121 ; of dog, 110 

 Theca interna, 121 ; of dog, 110 

 Thelyplasm, 690 



Thymectomy, in guinea-pig, 379 sq. ; in 

 rabbit, 380 ; in fowl, 380 ; in dog, ib. 

 Thymine, 308 sq. 

 Thymus, relation of, to testes, 379 sq. ; 



effect of castration on, 379 

 Thyroid gland, relation of, to sexual 



organs, 384 

 Thyroidectomy, 385 

 Tiger, period of gestation in, 53 

 Timor pony, cestrous cycle in, 46 

 Toad, breeding season in, 18 ; oviposition 

 in, 135 ; ferment of gonads in, 318 ; 

 sex-determination in, 669. See also 

 Foetid toad and Fire-bellied toad 

 Todas, sex-ratio among, 662 

 Tortoise, phenomena associated with 



breeding in, 28 ; longevity in, 722 

 Toxaemias of pregnancy, 392, 533 sq., 546 

 " Trager," 468 



Transplantation, of ova, 209 : ovaries, tb. 

 Traumatisms, 375 

 Tree-frog, breeding season in, 18 

 Trichosurue, breeding habit of, 67 

 Trichosunts vulpecula, breeding season in, 



36 



Triplets in man, 624 

 Triton, spermatozoa of, 168 

 Triton alpestris, hybridisation in, 210 ; 



sex -reversal in, 693 

 Triton waltlii, breeding season in, 20 

 Tropidonatus, egg-membrane in, 289 

 Trophoblast, 402, 405, 407, 409 sq., 508 

 sq. ; of mouse, 422 ; of rat, ib. ; of 

 horse, 429 ; of pig, 428 ; inter-cotyle- 

 donary, in cow, 432 ; in ruminants, 

 439 sq. ; of sheep, 464 ; absorption 

 of haemoglobin by, ib. ; of beaver, 476 ; 

 of hedgehog, ib. sqq. ; of shrew, 481 

 sq. ; of Tupaia javanica, 485 sq. 

 of bat, 487, 489 ; of Primates, 490 ; 

 of Semnopithecus nasicus, 491 ; of 

 man, 494, 496 sq., 499 

 Trophocyst of mole, 484 sq. 

 Trophosphere of hedgehog, 478 

 Trophospongia, of hedgehog, 478 sq. ; 



of Tupaia javanica, 486 

 Trophoblastic activity, nature of, 509 sqq. 

 " Trypanblau," see Trypan blue 



