INDEX 



159 



Lung, 73 



Luteal cells, 28, 43, 74 



Lutein, 129 



Luxurious conditions, 56, 58 



Lying-in period, 81 



Lynuintria dispar, 134 ; see Gypsy 



moth 

 Lymph vessels, 69 

 Ljmiphatic gland, 32 



M 



Macaque {Macacus rhesus), o?strus 

 in, 55 ; ovulation and menstrua- 

 tion in, 56 



M'Carrison, 110 



Macht and Loubin, 58 



M'Ilroy, 99 



Maize, inbreeding in, 140-1 



Male reproductive organs, 16-25 



Male-feathering of ovariotomised 

 hen, 95 



Mall, 56 



Malnutrition, 08 



Malthus, 149 



Mammge, 35, 104, 130 



Mammals, 62, 85, 133-4 ; balance 

 of sexes in, 126 ; intersexuaUty 

 in, 132 ; neutral type after 

 castration, 90 ; ova in, 7 ; ovaries 

 of, 28 ; reproductive organs in, 

 15 ; sexual seasons in, 41 



Mammalian sexual cycle, 41-59 



Mammary glands, 33-5, 42, 44, 47, 

 50, 51, 82, 98, 101, 104-5, 113, 130 ; 

 after lactation, 84 ; after ovario- 

 tomy, 104 ; atrophy at meno- 

 pause, 59 ; ducts of, 34 ; secretion 

 after removal of ovaries, 84 ; 

 unlike sahvary or sweat glands, 

 85 



Man, allantois in, 64 ; bu'ths in, 142 ; 

 birth-rate in, 146 fif. ; equal 

 inheritance of fertility, 142 ; 

 hermaphroditism in, 127 ; men- 

 strual cycle in, 51 ; pregnancy 

 in, 60 ; reproductive organs in, 



15 ; seasonal steriUty in, 55 ; 



sexual seasons, 41 ; uterus in, 



30 ; yolk sac, 62 

 Mandibular arch, 67-8 

 Mare, 42, 45, 70, 142-3; abortion 



in, 145 ; artificial insemination, 



144 ; ovariotomy in, 98 ; period 



of gestation, 76 ; placenta in, 



85 ; uterus in, 30 

 Marshall and Halnan, 46, 104 

 Marshall and Hammond, 88-9 

 Marshall and Jolley, 31, 44, 99, 



100 

 Marshall and Wood, 101 

 Marshall, Milnes, 51 

 Marsupials (marsupial cat), 49-51, 



62, 70, 104, 108, 145 ; pouch of, 



49, 70 

 Marsupium, 59, 70 

 Masculinisation, 128 

 Massaglia, 94 

 Masturbation, 144 

 Maternal blood vessels, 11 

 Maternal impressions, 122 

 Maternal organism, changes in, 74-5 

 Maturation, 8, 50, 117; of germ 



ceUs, 35-7, 115 

 Maupas, 5 



Maxillary process, 67-8 

 May Queen festivals, 57 

 Mediastinum testis, 17 

 MeduUa, 111 

 Medullary groove, 64 

 Mendel, 115 

 Mendelian theory, 115-17, 119, 



123-4, 126, 139, 140 

 Menopause, 59, 98, 133 

 Menorrhagia, 52 

 Menstrual clot, 52 

 Menstrual cycle, 51, 56, 58, 59, 98 

 Menstruation, 40, 54, 56-7, 75, 98, 



110, 113, 127, 138, 145 ; duration 



of, 58 ; during lactation, 58, 



83 

 Mental characteristics after castra- 

 tion, 88 

 Mental instability at menopause, 59 

 Merino sheep, 49, 88 



