SUBJECT INDEX 



1597 



Sheep (cont.) 

 sperm (cont.) 



survival time in female, 738 

 transport 



in epididymis, 712 

 in female, 730 

 velocity, 766 

 spermatogenic cycle, 328 

 spermatogenesis, thyroxine and, 669 

 superfetation, follicle-stimulating hormone and, 



244 

 superovulation, follicle-stimulating hormone 



and, 244 

 testis 



artery of, 319 



high temperature and androgen production, 



320 

 thyroid and, 347 

 time of descent, 313 

 uterotubal junction, 737 



uterus, carbonic anhydrase activity, 996-997 

 vagina, response to progesterone-estrogen, 1189 

 Sheep, Hampshire, breeding season, 502 

 Shell gland 



carbonic anhvdrase activity, hvpoi)hvsis and, 



1125 ■ 

 fowl, 1123 



porphyrin synthesis, 1147 

 Shrew 



aggressive behavior by female, reproductive 



state and, 1254", 1256 

 breeding season, 315-316, 502 

 developing ovum, free uterine period, 851 

 fertilization, ovarian, 822 

 Graafian follicle size, 505 

 litter size, 961 



male accessory reproductive glands, 373 

 masculine behavior by female, 1190 

 nest building, 1306 

 ovulation, coitus and, 277, 499 

 placental histochemistry, 922, 924, 928, 938 

 placental type, 908 

 pregnancy, length, 961 

 Shorebird 



disi)lacement nest -building, 1272 

 incubation patch, 1287 

 Short-tailed nianis, testis, interstitial tissue, 225 

 Sigmodon hispidus 



ovulation, temporal relation to estrus, 514 

 parental behavior, specificity, 1320 

 Silkworm, genetics of sex, 4 

 Siredon, chromosome pattern, 44-45 

 Siren, external fertilization, 1055 

 Sirenia (see also Manatee) 

 location of testes, 309 

 male accessory reproductive glands, 368 

 Skin color 



Acheilognathus, androgen and, 1046 

 Acris, androgen and, 1046 

 bitterling, androgen and, 1046 

 fish, ovariectomy and in females, 1052 

 Fundulus, androgen and, 1046 

 Lebisies, androgen and, 1046 

 Ori/zias, androgen and, 1046 

 Ix'Imileiift, androgen and, 1046 

 salamander, orchiectomy and, 1045 

 Skunk (see also Mephiius mephitus) 



identification of genetic sex, 55 

 Sloths 



implantation, regulation of site, 852 

 placental type, 914 

 seminal vesicles, types, 376 



Snakes 

 courtship behavior, 1044 

 hypophyseal cytology, carminophil-orangeophil 



distinction, 177-178 

 oviparous species, 1059 

 ovoviviparity, 1056 

 ovoviviparous species, 1059 

 parturition 



hypophysis and, 1059 

 posterior pituitary and, 1059 

 Ijregnancy 

 l)l()od levels of gestagens, 1059 

 corpus luteum and, 1059 

 hypophysectomy and, 253, 1059 

 ovariectomy and, 1059 

 sea, ovoviviparity, 1057 

 sex dimorphism, 1044 

 sperm storage in female, 1055 

 testis, interstitial cells, 1039 

 viviparous species, 1059 

 Social behavior 

 aggregations, 1241 

 aggressiveness, 1241-1244 

 agonistic, 1240, 1241 

 flocking res])onses, 1241 

 hierarrhiai. 1241 



hormones and development, 1257-1258 

 meteorologic conditions and, 1246 

 releasers of, 1258-1261 

 reproductive state and, 1250-1254 

 social inertia and development of, 1247-1249 

 territorial, 1241, 1242 

 Social development, man 



growth stages and, 1461-1463 

 individual care and, 1461 

 Social organization, subhuman vertebrates, types, 



1240-1242 

 Social stress, and reproduction, 1261-1262 

 Soma (see also Sex primordium) 

 character of 



and differentiation of morphologic sex, 115 



126, 138-141 

 and mating behavior, 1231-1221 

 experiential factors and character of, 1215 1221 

 genetic factors and character of, 1214-1215 

 1217-1219 

 Somateria sjx'i-lahiliK, inculcation, 1352 

 Somateria innllissinKi . incubation, 1352 

 Somatotropliiii (sec also (howth hormone) 

 and lactation, CDCi, (ilO-611 

 and nianiniary dcyelopment, 602-604 

 cellular origin, 175, 176, 178-181 

 cross-species tests, 255 

 during i)regnancy in man, 980-981 

 levels during i)regnancy in rat, 965, 981 

 Songbirds 



egg-laying i)attern, 1277 

 incubation 

 patch, 1287 

 pattern, 1284 



temporal relation to egg-laying, 1285 

 sinistral ovariectomy, and rudimentary right 

 gonad development, 1114 

 Sorbitol 



and seminal fructose level, 384 

 biosynthesis, 384 



in male accessory rej)ro(luctive glands, 384 

 in semen, MSI 385 

 Sorex fuiiicus {.sec Shrew) 

 Sparidae, gonads, development, 1060 

 Sparrow 



bill color, androgen and, 1091 

 egg-laying pattern, 1282-1283 



