512 



GENERAL INDEX 



Skeleton influence of sex glands in 

 15-16 



in sexual precocity 434 



Skopecs 6-8, 12-13, 16, 426, 441 

 Skull of castrated mammal 29, 32 

 Snipe 49 

 Soma, asexual embryonic 441 



'■ evolved characters 453 



and heredity 456 



— equipotentiality of 443 



— identical 47, 443 



— intersexual 460 



— neutral form 59 



Somatic characters in experimental 

 hermaphrodite 359 ft. 



"Somato-sexual" characters 470 



Special organ controlling sex char- 

 acters 65 



Sperm, injection of 331 



Spermatocytes 176, 187 



Spermatogenesis 127-8, 130, 133, 

 142-3, '150, 163, 170-1, 173, 

 176-8, 181, 188, 327, 342-4, 353, 



394. 427 

 Spermatogonia 131, 153-5, i?^, 



187. 345. 349, 373 

 Spermatozoa 63, 81, 129, 130, 143, 

 147, 148, 150, 153, 187, 336-8, 

 342 ff., 349, 428 



— vitality of, and secretion of 

 genital passages 343 



Spherical nucleus 112-3, 119 

 Spinal cord and clasp reflex 99-101 

 Spurs of cocks after castration 37, 



39 



after feminization 308 



— hens after castration 43 



— in experimental hermaphrodit- 

 ism 364 396 



Stag, feminized 293 



— mascuhnized 305 



Sterihty in man, effect of intoxica- 

 tion on 184 



effect of X-rays 153 



Sterilization 484 



Stylops 66 



Suprenal tumour 393 



Suprarenals after castration ^^ 



SyphiHs and interstitial cells 178 



Tadpole, experiments on 93, 287, 



339, 399 

 Tail reflex 297 

 Temperature, body, of female and 



male 298 

 Tertiary sexual characters i 

 Testes, extracts of 321, ^2^, 331 

 Testicle 104, 122, 336 



— and ovary, antagonism between 

 352 



Testicle, Berthold's experiments 8r 



— compensatory hypertrophy i55ff 

 — - crystalloids in 115 



— cryptorchid 322 



— endocrine function of 127, 196 



— engrafted 81, 148-152, 369 



— feeding with 92 



-- Foges' experiments 81 



— grafts from apes to men 88 



— in amphibians 187 



— in birds 191 



— in disease 178 ff. 

 — - in eunuchoid 426 



— in fishes 186 



— in frogs 90-1 



— in invertebrates 1 86 



— in the new-born 180 



— in toads 91 



— influence of X-rays on 153-5 



— internal secretions of 109, 154, 



195 



— poles of 156-7, 159 



— puncture of 129 



— retained 142, 148, 155, 163 



— retarded development 163 



— • transplantation of, in man 81, 



84-7, 90, 92, 399 

 — ■ tuberculosis, removal in 86 



— unilateral castration 157-8, 

 1 60-1 



— - unilaterally retained 142 



— undescended 372 

 Testicular fragment compared with 



ovarian 245-6 



— hormones, sex specific action 

 of 285 ff. 



implantation 395 



-section, incomplete 181 



substance, injection of 85, 



87, 92, 93 



• transplantation 299 



red corpuscles after 33 



— influence on clitoris 300-1 



Theca-lutein cells 226, 249, 366 

 Thelia bimaculata 66 

 Thistle-finch 48 

 Threshold quantity of hormones 



167 ft"., 195, 410, 423-4, 428-9 

 Thymus, after castration 33 



— extracts of 323 



Thyroid gland 3, 8, 80, 92, 104, 



183. 319, 399 



— after castration 33 



— feeding with 397, 438 



— functional relation to sexual 

 glands 3 



— ■ in Skopecs 8 



Time factor 65, 364, 389, 402-3, 



407-8, 423, 454 

 Time relations 124,177, 253, 264,321 



