INDEX 



i6i 



Oocytes, 36 



Oosperm, 10 



Operculum decidu?e, 72 



Opossum, 50, 104 ; cycle of, 50 



Orange colour (cats), 126 



Orgasm, sexual, 39, 50 



Os imiominatum, 15 



Os penis, 25 



Os pubis, 15 



Os uteri, 30, 38, 77, 143 



Osmosis, 73 



Ostrich, 8, 95 ; castration of, 

 95 



Ovum, -a, 3, 7, 9, 11, 25, 27-8, 35-6, 

 43, 45, 58, 60, 70, 115, 123-5, 131, 

 138, 140; human, 8, 70; seg- 

 mentation of, 60 ; telegonic in- 

 fluence, 122 



Ova and spermatozoa proportion, 

 12, 39, 137 ; produced in excess, 

 139 



Ovarian changes at pregnancy, 43 ; 

 at menopause, 59 



Ovarian cysts, 101 



Ovarian extract, 109 ; injection of, 

 99 



Ovarian folhcle, 37, 42 



Ovarian secretions, 109, 113-114 



Ovarian stroma, 100 



Ovario-testis, 127-8 



Ovariotomy, 86, 90, 94-5, 104, 113 ; 

 economic reasons for, 98 ; in 

 woman, 98, 104 



Ovary, 3, 4, 9, 18, 25-7, 45, 47, 

 59, 81, 98-9 ; and parturition, 

 108-10 ; and uterus, correlation, 

 99 ; cautery of, 102 ; endocrine 

 activities of, 81 ; grafting, 98-9, 

 130 ; hen's, after sex reversal, 

 128 ; internal secretions of, 92, 

 98, 109 ; removal of, from preg- 

 nant women, 104 ; similarity 

 to testis, 98 ; tumour of, 

 133 



Over-population, 147 



Overwork, 58 



Oviducts, 25, 28, 48 ; see Fallopian 

 tubes 



Ovulation, 27, 37, 39, 43. 45, 47-8, 

 50, 53, 55-7, 75, 108, 113, 138, 

 142 ; at menopause, 59 



Oxen after castration, 90 



Ovster, 124 



Pacinian body, 23, 32 



Pad of frog, after castration, 91 ; 



after testicular transplantation, 



92 

 Painter, 35 

 Palalo {Eunice), 13 

 Palpitation at menopause, 59 

 Pancreas, 70 

 Papilla?, 35 



Paradise, bird of, tail in, 126 

 Pammceciioii senile, 6 

 Paraplegia, 80 

 Parasitic castration, 129, 133, 



135 

 Parkes, 126 



Parkes and Druiveviond, 139 

 Parthenogenesis, 10 ; a seasonal 



phenomenon, 10; artificial, 10'; 



partial. 11 

 Parturition, 43, 77-85 ; cause of, 



80; factors responsible, 108-10; 



nervous mechanism of, 80 ; in 



lower mammals, 85 

 Paton, 104 

 Pavloff, 120 

 Payne, 120 

 Peacock, tail of, 126 

 Pearl, 142 



Pearl and Boring, 128 

 Pearson, 142 

 Peas, hybridisation experiments 



(Mendel's), 116-17 

 PeUogaster, 129 

 Pelvic symphysis, 33, 78 

 Pelvis, 15, 58, 82; difference be- 

 tween male and female, 16 ; of 



eunuch, 87 

 Penile erection, after castration, 



87, 88 



