INDEX 



165 



" Sopranists," efifect of castration, 

 87 



Sow, 42, 45, 80, 104, 138, 142; 

 ovariotonw, 89, 98 ; ovary, ex- 

 tract of, 109 ; period of gestation 

 in, 76 ; uterus in, 30 



Spallanzani, 143 



Spaying experiments, 99, 130 



Spermatic cord, 16, 17 



Spermatids, 19, 36 



Spermatocyte, 18, 19, 36 



Spermatogenesis, 36-7, 41 ; genetic 

 tissue in, 93, 112 



Spermatogonium, 18, 19, 127 



Spermatophores, 12 



Spermatozoon, -a, 3, 7, 9, 11, 12, 

 19, 20-1, 35-6, 39, 40, 43, 58, 59, 

 93, 112, 115, 123-5, 127, 138, 

 143-4 ; and ova proportion, 12, 

 39 



Spinal cord, 38, 80 



Spinal paralysis, 80 



Splanchnopleur, 62, 66 



Spleen, 70 



Sponges, reproduction in, 4 ; fertili- 

 sation, 12 



Spring season, 57 



Spurs in cocks, 95, 130 



Stag, antlers of, in sexual selection, 

 126-7 



Stag-horn beetle, horns of, 127 



Stages of uterine cycle, 51 ; con- 

 structive, 51, 53 ; destructive, 



52, 53 ; quiescence, 53 ; repair, 



53, 55 



Stallion, fertility of, 137 



Stanley and Kelker, 111 



Steinach, 92-3, 111-12, 130 



Stenorhynchiis, 129 



Sterile coition, 102 



Sterility, 6, 59, 108, 137-44; by 



operation, 51 ; and cryptorchism, 



19 

 Sterne, 79 

 Sternum, 75 



Stimuli to sexual activities, 14 

 Stockard, 120 

 Stockard and Papanicolaou, 49 



Stroma in ovary, 25-6 ; in prostate 

 gland, 21 ; in uterus, 30, 31, 46, 52 

 Stylonichia, reproduction in, 5 

 Sublimation of sexual energy, 148 

 Suckling, 45, 84 ; see also Lactation 

 Suggestion, influence of, in rejuvena- 

 tion, 113 

 Sulphur, 1 



Superfecundation, 142 

 Superftetation, 142 

 Suprarenal glands in masculinisa- 

 tion, 128 ; disturbance of hor- 

 monic activity, 135 ; tumours of, 

 135 

 Sweat glands, 69, 85 

 Sweating at menopause, 59 

 Symphysis, ischio-pubic, 16 ; pelvic, 



33, 82 

 Synapsis, 37, 119 

 Syncytium, 62, 70 

 Syncytiotrophoblast, 62, 71, 72 



Tandler and Gross, 93 



Tandler and Keller, 94 



Teacher, 72 



Teeth. 69 



Tela subcutanea penis, 22 



Tela subfascialis, 22 



Telegony, 121, 122 



Testis {or testicle), 3, 4, 9, 16, 17 

 in birds, 17 ; in hedgehog, 17 

 in insectivora, 17 ; in man, 18 

 19, 41 ; in mole, 17 ; in ram, 18 

 in rat, 18 ; in rodents, 18 

 grafting (rejuvenation). 111, 112 

 influence on secondary sexual 

 characters, 91 ; in parasitic 

 castration, 129-30 ; internal secre- 

 tions of, 91-4 



Testicular gland, 128 



Testicular hormone, 113 



Testicular transplantation, 91-3, 

 112-13, 130; in fowls, 91; sex 

 reversal after, 92 



Theca, 47 



