INDEX 



121 



Hormones of corpus luteum, 

 65, 66 



of ovary, 62 



of placenta, 50 



of testis, 53 

 Hypophysis, 46 

 Hypothalamus, loi 



Implantion of embryo, de- 

 layed, 7 



Internal reproductive rhythm, 

 23, 32, 72 



Interstitial cells, of ovary, 58, 

 60 

 of testis, 51 



Interstitial-cell-stimulating- 

 horm.one, 4.9, 51, 56, 

 60, 69 



Junco, effects of exercise on, 



74 

 effects of light on, 26 



migration of, 91, 92 



Latitude, effects of, 8, 9, 11 

 Light, effects of, 25, 32, 74., 91 



intensity of, 28, 36 



wavelength of, 35, 36, 74 

 Luteinizing hormone, 4.9 



Male behaviour, and hor- 

 mones, 87 



and testes, 83 



in females, 85. 86 

 Male hormones, 52, 53, 64, 87 

 Mammals, autumn breeding 



in, 31 

 effects of adrenal cortex, 86 

 effects of anterior pituitary 



hormones, 48 

 effects of castration, 84 

 effects of domestication, 12 

 effects of emigration, 22 

 effects of light, 28 

 effects of ovary removal, 85 

 hormones and behaviour, 



87 



sex reversal, 86 

 tropical breeding season, 34 

 Man, breeding habits of, 12, 

 16, 36, 83 

 effects of adrenal cortex, 86 

 effects of castration, 84 

 effects of nervous shock, 78 

 effects of ovary removal, 85 

 hormones and behaviour, 



89, 90 

 menstrual cycle, 17, 36, 70 

 sex reversal, 86 

 social dominance, 89 

 sterility in siege, 13 

 time of ovulation, 17, 70 

 Maturity, times of, 4 

 Menstrual cycle, 17, 36, 70 

 Migration in birds, 91 



effects of castration, 93 

 effects of gonad size, 26, 



33, 91 

 effects of hormones, 93 



effects of light, 33, 9 1 

 Mitogenic hormones, 55, 63 

 Monkeys, hormones and be- 

 haviour, 90 

 oestrous cycles of, 17 

 sexual behaviour, 83 

 Moroestrous mammals, 16 

 Monsoon, effects of, 38 

 Moon, effects of,\36 



palolo v^orm and, 2 

 Movements of animals, 

 effects of, 20 



New . Hebrides, expedition 



to, 34 , . r 



New Zealand, introduction of 



animals, 21 



Nervous activity, effects of 



anterior pituitary 



gland on, 75, 76, 96 



effects of gonads on, 81 



effects of hormones on, 87 



Nocturnal animals, question 



of, 30 



