1554 



SUBJECT INDEX 



Insectivora (cont.) 

 male accessory reproductive glands, and homo- 



logues in female, 368 

 ovary, bisexuality, 86 

 prostate, 369 

 testis, location, 309 

 yolk sac placenta, 917 

 Insects 



artificial insemination, 728 

 social hfliiivior, genetic basis, 1244 

 Insemination, mammals, site of, 727 

 Instinct, discussion of concept, 1402-1404 

 Insulin 



and mammary development, 605 

 and mammary tissue RQ, 619-620 

 and seminal fructose level, 382 

 bioassay method, 619 

 Interhemal spines, Oryzias, gonadal hormones 



and, 1069 

 Intermedin, 198-201 



and hypophyseal gonadotrophin secretion, 512 

 cellular origin, 163, 207, 210 

 chemical characterization, 200 

 secretion, corticol lopliin and, 212 

 Interneural spines, On/zidf. gonadal hormones 



and, 1069 

 Interrenal body, selachians, origin, 1070 

 Intersexes 



mammals, 52, 149-150 

 pigs, nuclear chromatin, 52 

 Sciara triploid hybrids, 31 

 Intersexuality 



and mating behavior in Drusuphila ainericana, 



17 

 Drosophila sp., 14-15 



gene basis, 13-20 

 Droscphild ririlis 



eml)ry()nic development, 14 

 genotyjx's, 14 

 gene basis, 14-21 

 Lymantria, 8 



morphologic basis, 83, 111 

 Interstitial cells (see also Leydig cells) 



in fetal testis, 145 

 Interstitial tissue, ovarian, secretion of estrogen, 



531 

 Intromittent organ, fish, 1041-1042 

 Iron, histochemical differentiation, 891 

 Isocaproic acid, and steroid biosynthesis, 046 

 Isocitric dehydrogenase 



activation, estrogens and, 656 

 in semen, 392 

 Isoprene unit, and cholesterol biosynthesis, 644- 

 645 



Jacamidae 



incubation behavior, by male, 1106 



testis, secretion of estrogen, 1106 

 Jacana, incubation patch, 1287 

 Jacana spinosa, incubation, by male, 1286 

 Jackass, seminal vesicles, citric acid secretion, 388 

 Jenynsia, intraovarian fertilization, 1054 

 Jenynsiidae, intraovarian embryogenesis, 1059 

 Jimco 



breeding cycle, factors regulating, 1145 



gonadal functioning, environmental tempera- 

 ture and, 1141 

 J unco }i!/( iiKiIis 



fat (Icpositidn cycles, 1139 



spermatogenesis, testosterone and, 1101 

 Junco oregontis, gonodotrophin stimulation of 



testis, adrenaline and, 1104 

 Juvenile amaurotic idiocy chromosome idiogram, 



65 

 Jynx torquiUa, egg-laying pattern, 1283 



7-Ketocholesterone, in spermatic vein of dog, 334 

 6-Ketoestradiol, and isocitric dehydrogenase ac- 

 tivity, 656 

 11-Ketoetiocholanolone, cholesterol derivative, 



644 

 A^-3-Ketopregnene-20-a-ol 



and steroid biosynthesis, 646 



biosynthesis, 646 



gestational action, 660 



gestagenic activity, 660 



in corpus luteum, 647 



in placenta, 647 

 A'*-3-Ketopregnene-2()-/3-ol 



gestagenic activity, 660 



gestational action, (UiO 

 Ketosteroids, levels during pregnancy, 976 

 Kidnev function, ])regnancv and, 995-996 

 Klinefelter 's syndrome, 58-59, 348 



chromosome patterns, 58-59, 62 



color vision in, 58-59 



genetic basis, 62 



genie constitution, 353 



urinary gonadotrophin levels, 335 



Laceita 



breeding season, 1050 

 femora! glands 



accessory sex structures in male, 1043 

 orchiectomy and, 1045 

 genital tract, development, 1061-1062 

 gonads, development, 1061-1062 

 hermaphroditism , 1065-1066 

 mesonephrus, androgen and, 1047 

 orchiectomy, effects of, 1045 

 ovary, structure, 1050 

 oviduct 



ovariectomy and, 1052-1053 

 specialization for ovoviviparity, 1052 

 pseudohermaphroditism , 1066 

 sexual segment , 1041 

 testis, interstitial cells, 1039 

 urogenital fossa 



ovariectomy and, 1053 

 seasonal changes, 1052 

 Wolfhan duct, androgen and, 1047 

 Lacerta agilis 

 cloaca, sexual specialization, 1043 

 ovoviviparity, 1056 

 testis 

 interstitial cells, 1039 

 regeneration, 1045 

 Lacerta viridis, corpus luteum, 1059 

 Lacerta vivipara 

 corpus luteum, 1059 

 epididymis, seasonal changes, 1040 

 parturition 



hypophysectomy and, 1059 

 ovariectomy and, 1059 

 progesterone and, 1059 

 Lactation (see also Galactopoiesis, Lactogenesis, 

 Milk-ejection) 

 adrenal corticoids and, 612-614 

 and implantation, 851 

 and length of pregnancy, 851, 959 

 estrogen and, 613-617 

 estrogen-progesterone and, 615-616 

 hormonal initiation, 1325-1327 

 hypophyseal cytology, 179, 205, 1327 



'carminophil cell activity, 1179 

 hypophysectomy and suppression of, 1315 

 man, hypophyseal stalk transection and, 284 

 neurohumoral basis, 627-632 

 neurohumoral blocking agents, 630-632 

 ovarian follicular growth and, 459 

 oxytocin and, 284 



