1536 



SUBJECT INDEX 



Elk 



development of behavior, parental care and, 



1358 

 parental behavior, specificitv, 1320 

 parturitive behavior, 1306, 1310, 1312 

 recognition of young, 1320 

 social behavior, ie])ro(iuctive state and, 1250 

 Emberiza, neurohypoi)h\sis blood supply, 1099 

 Embiotocidae 



intraovarian embryogenesis, 1057 

 sperm storage in female, 1055 

 viviparity, 1057 

 Embryo (see also Developing ovum) 



mammalian, collection of, 799 

 Embryonic abnormality (see Developmental de- 

 fects) 

 Embryonic development, fish 

 intraovarian, 1054-1057 



adaptations for food absorption, 1057 

 sources of nutrition, 1057 

 Laceria 



corpus luteum and, 1059 

 hypophysectomy and, 1059 

 Embryonic gonads 



amphibia, hormonal activity, 112, 135 



birds, hormonal activity, 99, 112, 115, 119, 147 



bisexuality, 83-86, 95-96, 100-105, 1070 



freemartin, 143 



mammals 



hormonal activity, (see also Fetal gonadal 

 hormones), "104-105, 114, 115, 119, 121, 

 123-124, 133-134, 140, 143-145, 147 

 beginning, 143-144 

 Embryonic loss (see Developmental mortality) 

 Emetic responses, pigeons, conditioning to ex- 

 ternal stimuli, 1346 

 Emotionality, rats 



selective breeding and, 1355 

 handling during infancy and, 1358 

 Eviys 



hermaphroditism, 1066 

 oviduct, mucosal cells, 1051 

 pseudohermaphroditism, 1066 

 testicular interstitial cells, seasonal changes, 

 1038 

 Emys leprosa 



gonads, bisexuality, 1070 

 ovulation, season of, 1049-1050 

 spermatogenesis, seasonal occurrence, 1037 

 Endodermal sinuses of Duval, in yolk sac placenta, 



918 

 Endometrial hyperplasia, etiology of postmeno- 

 pausal, 477 

 Endometrium (see also Menstruation, Uterus) 

 carbonic anhydrase in, 996 

 cj'tochemistry, 740-741 



estrogen-progesterone relationships, 581-582 

 implantation 

 plaques, 571-572 

 response, histamine and, 863 

 monkey 



cyclic changes, 584 

 estrogen and, 560-565 



estrogen-progesterone and, 567-571, 581, 582 

 progesterone and, 578-582 

 premenstrual changes, 581 

 preparation for implantation, 861 

 progesterone and, rabbit compared with mon- 

 key, 582 

 response to blastocyst, 862 

 transhydrogenase in, 651 

 Engyrus carinatus, sexual dimorphism, pelvic 

 spurs, 1044 



Enheptin (2-amino, 5-nitrothiazole), and testicu- 

 lar inhibition in fowl, 1108 

 Enhydrina 



corpus luteum, 1059 

 ovoviviparity, 1057 

 Enolase in male accesory reproductive glands, 392 

 Entosphenus wilderi 

 gonads 

 bisexuality, 1060 

 development, 1048 

 Enzymes 

 activity of 



estrogens and, 652, 654, 656 

 progesterone and, 652 

 histocheniical differentiation, 890-891 

 Epididymal fluid 



chemical i-()mi)osition, 716 

 sodium |)()tassiuni ratio, 720 

 Epididymal sperm (see Sperm) 

 Epididymis 

 Anolis 



androgen and, 1068 

 estrone and, 1054 

 citric acid secretion, 388 

 cytochemistry, androgen and, 715 

 7-dehydrocholesterol in, 387 

 differentiation, fetal testis and, 715 

 Eumeces, androgen and, 1047 

 fowl, changes in sperm, 1094-1095 

 glycerophosphorylcholine secretion, 387 

 glycosidases in, 392 



guinea pig, prepubertal development, 307 

 histogenesis, 715, 718-719 

 histology, 714 



Lacerta, orchiectomy and, 1045 

 length, 715 



lizards, structure, 1041 

 mammals 



amino sugars in, 385 

 androgen and, 715-716 

 acid phosphatase, 715 

 alkaline phosphatase, 715 

 development in female, 115, 120 

 secretory function,, 714 

 sperm transport, 712-713 

 motility, 712 



posterior hypothalectomy and, 715 

 ram, distribution of sperm, 714-715 

 reabsorption in, 714, 715 

 regional differences, 715-717 

 reptiles, 1040 



seasonal changes, 1040-1041 

 Sceloporus 

 estrone and, 1054, 1068 

 testosterone and, 1047, 1068 

 seasonal changes, 716 

 secretion of choline derivatives, 393 

 secretion of glycosidases, 393 

 Terrapene, orchiectomy and, 1045 

 turtles 



androgen and, 1038 

 seasonal development, 1038 

 16-Epiestriol 



estrogen metabolite, 649 

 isocitric dehydrogenase activity, 656 

 unknown mode of formation, 647 

 Epiloia, chromosome idiogram, 65 

 Epinephrine 



and milk-ejection, 625, 1324-1325 

 and ovary in sparrow, 1133 

 and sperm release in Rana, 1037 

 and spermatogenesis in fowl, 1104 



