1524 



SUBJECT INDEX 



Birds (conl.) 



ovarian follicular growth (cont.) 



presence of other birds and, 510 



relationship to time of egg-laying, 1272-1273 

 ovary 



assymetrical development, 1111-1114 



estrogen secretion, 1117 



follicular growth, 1272-1273 



hormones of, 1117-1121 



progesterone secretion, 1120 

 oviduct 



anatomy, 1122-1123 



ovarian hormones and, 1123 112-1, 1275, 1293 



unilaterality, 1112 

 ovulation 



external stimuli and, 277, 1277-1283 



progesterone and, 1131 



testosterone and, 1131 

 ovum, vitamins in, 680 

 ])arental behavior, 12'JS 1304 



external stimuli and, 1300-1301 



inhibition bv gonadal hormones, 1300 



prolactin and, 1299-1300 



role of the sexes, 1298-1299 

 precocial young, 1298 

 progesterone, actions of, 1120-1121 

 releasers, 1260 

 reproduction 



environmental temperature and, 1141-1142 



in female, vitamin E dependence, 686 



in male, thyroid and, 1104-1105 



light and, 1137-1141, 



ne.sting sites and, 1142-1143 



psychic factors and, 1143-1144 

 rudimentary light gonad, 1111-1114 



inanition and, 1104 

 semen, 376, 377 

 sex determination, 47-49 

 sex differentiation 



constitutional factors and, 138-139 



gonad graft experiments, 78-79 



gonadal hormones and, 135-137 



hormone experiments, 82 

 sex reversal in gonads, 95-100, 110 

 social behavior, 1242, 1257 

 song, relation to territoriality, 1260 

 sperm 



duration of fertilizing capacity, 1109, 1271 



hyaluronidase concentration, 829 

 spermatogenesis, body temperature and, 1089 

 syrinx development, gonadal hormones and, 116, 



131-132 

 testis, hypophysectomy and, 1100 

 tissue responsiveness to androgen, thyroid and, 



1104-1105 

 Wolffian duct development, castration and, 121 

 Bird-song 



androgen and expression of, 1357 

 parental example and development of, 1357 

 Bisexuality 



embryonic gonads, 83-86, 95-96, 100-105, 1070 

 human fetus, 1401 



reproductive system, 83-85, 111, 1060-1062 

 Bison bison 



parental behavior, specificity, 1320 

 parturitive behavior, 1310, 1313 

 recognition of young, sensory cues, 1320 

 Blarina brevicauda (see Shrew) 

 Blastocyst 



chemical components, 860 

 growth, progesterone and, 859 

 proteolytic activity, 905-906 

 role in implantation, 857-865 

 16-day in man, 884-885, 891 



Blennius, ovary, type, 1049 



Blenny, glandes annexes in male, 1039 



Blood 



calcium levels in snakes, 1052 



magnesium levels in snakes, 1052 



protein levels in snakes, 1052 

 Blood calcium 



goldfish, estradiol and, 1070 



in Xenopus, ovariectomy and, 1052 

 Blood constituents 



birds, estrogen and, 1117-1118 



during pregnancy, 988-990 

 Blood phosphorus, goldfish, estradiol and, 1070 

 Blood protein, goldfish, estradiol and, 1070 

 Blood sugar and spermatogenesis in rat, 693 

 Blutstrieme, hermaphroditism, 1062 

 Boa 



courtship behavior, 1044 



testis, interstitial cells, 1039 

 Body color 



Lacerta, orchiectomy and, 1045 



Oryzias, genetic basis, 1070 

 Body temperature 



and spermatogenesis in turkeys, 1142 



prolactin and, in rooster, 1347 

 Boettcher's crystals in semen, 386 

 Boiga midtimaculata, sperm storage in female, 



1055 

 Boleosoma, hermaphroditism, 1063 

 Bomhinator , male secondary sex characters, an- 

 drogen and, 1045, 1046 

 Bombycilla cedrorum 



incubation, temporal relation to egg-laying, 1284 



nest-building, temporal relation 

 to copulation, 1271 

 to egg-laying, 1273 

 Bombyx mori 



chromosome pattern, 34 35 



sex determination, 34-35 



sex mosaics, methods of development, 35 

 Bonnsa umbellus 



nest-building, temporal relation 

 to copulation, 1271 

 to egg-laying, 1273 

 Bone formation in birds, androgen-estrogen syner- 

 gism and, 1120 

 Bonellia, sex determination, environment and, 44, 



45 

 Bos taunts (see Cattle) 

 Bothrops 



corpus luteum, 1059 

 gestagens in, 1059 



pregnancy, corpus luteum and, 1059 

 Bothrops atrox, sexual dimorphism, tail-tip, 1044 

 Bothrops jararaca, testis, androgen content, 1038 

 Bradypodidae, placental type, 908 

 Branta bernicla 



egg laying, determinate, 1144 



ovulation, nesting site and, 1142-1143 



testicular involution, arrival at nesting site 

 and, 1143 

 Breeding season 



amphibia, 1036-1037 



fish, 103.5-1036 



Gadus (■.'<!,i(irkn. 1069 



Gndus nirrlanfi„s, 1069 



Hippoidinpii.s. 1069 



Odontogadus, 1009 



Oryzias, 1069 



Reporhampus, 1069 



reptiles, 1037 



Streptopelia compared with Zenaidura, 1353 

 Breeding types among mammals 



continuous, 316 



