SUBJECT INDEX 



1575 



Penis (cont.) 

 man (cont.) 



androgen and, 1387 

 growth, 333-334 

 opossum, erectile bodies, sexogens and, 128 

 reptiles, 1042 



androgen and, 1047 

 turtles, sex dimorphism, 1042 

 Peophila castanatus 



feminine behavior by males, 1179 

 spermatogenesis, inherent cycles, 1141 

 Perch 



hermaphroditism, 1063 

 spawning, seasonal occurrence, 103fi 

 Perineal muscles, rat, androgen and, 660 

 Perineal swelling (see Sex skin) 

 Periophthalmus, seminal vesicles, comparison with 



mamm;ili;iii. l(i:'.'.l 

 Peripafopsis {Oni/chdphnrd), sperm, penetration 



of somatic tissues, 744-745 

 Perissodactyla, male accessory reproductive 



glands, 368 

 Peritoneal cilia, Rana, estrone and, 1054 

 Peri-urethral connective tissue, estrogen and, 128 

 Peri-urethral glands, distinction from female 



prostate, 374 

 Peromyscus leucopus 



breeding season, illumination and, 502 

 litter size, 960 



parturition, change in behavior, 1306 

 pregnancy, length, 960 

 Peromi/seiis )))(uiic)datus 

 parental behavior 



retrieving by male, 1314 

 subspecies differences, 1355 

 pregnancy, length, 960 

 Persistent estrus in rat, gonadotrophins and, 469, 



530 

 Persistent follicle 



age of animal and, 529 

 hypothalamic block and, 529-530 

 illumination and, 529 

 partial nephrectomy and, 529 

 strain differences, 529 

 Persistent ovulation, ovarian circulation and, 529 

 Persistent vaginal estrus, rat 

 androgen and, 469 

 desoxycorticosterone and, 530 

 estrogen and, 530 

 hypothalamic block and, 529-530 

 illumination and, 529 

 progesterone and, 267-268, 271, 530 

 testis grafts and, 529 

 testosterone and, 267-268, 269, 529-530 

 Petrochelidon pyrrhonaia 

 nest-building 



role of sexes, 1270 



temporal relation to copulation, 1271 

 Petromyzon (see also Cyclostomes) 

 genital ducts, androgen and, 1046 

 gonads, development, 1060 

 oviduct, absence of, 1051 

 Phalacrocoridae, parental behavior, role of the 



sexes, 1299 

 Phalacrocorax africanus, breeding, nesting sites 



and, 1143 

 Phalacrocorax carba, breeding, nesting sites and, 



1143 

 Phalaropodidae 

 incubation 

 behavior, 1284 



by male, 1106 

 patch, 1287 



Phalaropodidae (cont.) 



parental behavior, role of the sexes, 1299 



testis, secretion of estrogen, 1106 

 Phalaropus lobatus 



reversal of sex roles, 1255 



social behavior, reproductive state and, 1255 

 Phallus 



fowl, androgen and, 1091 



mammalian embryos 



castration and differentiation, 116, 118, 129 

 comparison 

 with prostate, 129 

 with gonaducts, 129 



opossum 



embryo, gonadal hormones and differentia- 

 tion, 122, 126, 127, 128 

 histologic changes in sex reversal of, 127-128 

 Pharyngeal hypophysis, 212 

 Phasianidae 



egg-laying 



interruption of incubation and, 1297 

 pattern, 1277 

 removal of eggs, 1297 



incubation pattern, 1284 



parental behavior, prolactin and, 1299 



precocial young, 1298 

 Phasianus colchicus 



dominance, breeding cycle and, 1251 



hypophyseal gonadotrophins 

 seasonal fluctuations, 259 

 sex differences, 257 



hyp()i)liys('a! hormones, prolactin, 1101 



incubation, hypophyseal prolactin during, 1128, 

 1289 ' 



male feathering, 1119 



ovary, ruptured follicles, 1114 



polygamous behavior, testicular function and, 

 1102-1103 



social behavior, low temperature and, 1246 



territoriality, breeding cycle and, 1251 

 Phenol sulfatase in male accessory sex glands, 392 

 Phenylketonuria, chromosome idiogram, 65 

 Phileliilnis snriu^, nest, 1270 

 Philouutihiix jjiifinax 



nest-building, role of sexes, 1270 



plumage, androgen and, 1091 



sperm, 1096 

 Phocidae, parturitive behavior, 1311, 1312 

 Pholidota, male accessory reproductive glands, 368 

 Phosphohexoisomerase in semen, 392 

 Phospholipids, histochemical differentiation, 889 

 Phosphorylase, progesterone and activity of, 652 

 Phoxinus 



hermaphroditism, 1063 



male skin coloration, castration and, 1044 



sex reversal, testosterone and, 1065 

 Phoxinus phoxinus, hypophyseal basophils, 188 

 Phoxinus laevis 



neurosecretion, 225 



oogenesis, estrogen and, 451 



sex reversal of males, estrogen and, 1067 



source of androgen, 1037 

 Phrynosoma 



oviduct, pro-ovarian cilia, 1052 



testis, interstitial cells, 1039 

 Phrynosoma cornutum, oviparity, 1056 

 Phrynosoma douglassi, viviparity, 1056 

 Phyllobates, transport of larvae by males, 1048 

 Phylloscopus, neurohypophysis, blood supply, 1099 

 Pica pica 



egg-laying, suppression of, 1283 



neurohypophysis, blood supply, 1099 



