i6o 



INDEX 



Mesoderm, 61-4, 69, 71-3 



Mess EL, 27, 47 



Metabolism, after castration, 90, 

 98 ; after parasitic castration, 

 129 ; of menstruation, 57 



Metazoa, 6 



Mice, see Mouse 



Micturition, during pregnancy, 75 



Midwife toad, 120 



Milk, 33-4, 45, 58, 83-4, 104, 130 ; 

 composition of, 35, 83 ; in virgin 

 animals, 104-5 



Milk production, 123 



MiLLAIS, 143 



Millions fish {Girardinus), 129 



MiNOURA, 132 



Miscarriage, 145 



Mole, 17, 41 



Molluscs, effect of warmth or cold 

 on, 13 



Monkey, 51, 53, 55-6 ; menstrual 

 cycle in, 51 ; penis of, 23 ; pro- 

 state gland in, 21 ; seasonal 

 sterility in, 55 ; spermatozoa in, 

 7 ; testis of, 17 ; vagina of, 32 



" Monkey gland," 94-112 



Montecious, 11 



Monrestrous animals, 42, 45, 48-9, 

 113 



Monotremata, 85 



Mons veneris, 33 



Montmorency, glands of, 83 



Moore, 130 



Morgan, 11, 119-21, 124, 140 



Morning sickness, 75 



Morula, 60-1 



Mother cell, sperm, 36 



Moths, 125 



Motile cells, 124 



Motor impulses in coition. 38 



Mouse, 139 ; corpus luteum, 29, 

 43 ; cycle of, 49, 59 ; experi- 

 ments with, 120, 143 ; heat in, 

 101 ; ovum of, 9 ; yellow, 139 



Mouth, 67 



Mucosa, see Uterine mucosa 



Mucous membrane, 31, 94 



Multicellular animals, 3, 6 



Multiple births, 142 ; by different 



sires, 142 

 Murlin, 57, 90 

 MuRLiN and Bailey, 98 

 Muscle, 2, 28 



Muscle fibres, 19, 21, 24, 32, 35 

 Muscle layers, 31 



N 



Nagel, 22, 39 



Natural selection, 49, 124, 126 



Navel, 74, 78 



Neoplasm, 128 



Nerve, 2 ; of penis, 22 



Nerve fibres, centripetal, 92 



Nerve system (central), 92 



Nervi erigentes (dog), 88 



Nervous system, 69 



Neural canal, 64 



Neurasthenia, 59 



Neurasthenic disturbances, 148 



Neutral type, after castration, 89, 



90, 95, 96 

 Newt, regeneration of lost parts, 4 ; 



sex reversal, 129, 135 

 Nipple, 34, 35, 74, 82-3 

 Normal birth, 79 

 Nose, 68 



Nuclear material, 35 

 Nucleus, 1; 2, 8, 10, 37, 71, 115, 125 ; 



essential to life of cell, 1 

 Nucleolus, 8 



NUSSBAUM, 92 



Nutritional influence, 112, 137, 



139 

 Nymphae, 32 

 Nymphomania, 101 



GEstrus, 33, 41, 43, 48-50, 55-6, 101, 

 108, 136-7 ; see also Heat and 

 Rut 



(Estrous cycle, 98-9 



Olfactory pit, 67 



