66 



INDEX 



Thigh bone, 15 



Thomson, Allen, 60 



Thorek, 94, 112 



Thread cells, 4 



Thymus, 70, 88, 111 



Thyroid gland, 57, 70, 75, 110, 

 111 



Tiedemann's glands, 33 



Tiger, sexua] apparatus in, 25 



Tissues, 2 



Tissue stroma of testis, 19 



Tortoiseshell (cats), 119, 126 



Trabecule, 22, 24 



Transplantation of ovar}^ 99, 113, 

 130 ; after previous castration, 

 130 



Triplets, in man, 142 



Triton cristata, 129 



Trophobiast, 61-2, 70-1, 73 



Tubules, 19, 21, 128 



Tumescence, sexual, 38 



Tumours of ovary, 133 ; of supra- 

 renals, 135 



Tunica albuginea, 17, 19, 22 



Tunica penis, 22 



Tunica vaginalis, 19 



Tupping time, 45 ; see also Rut, etc. 



Twins, in man, 79, 142 ; by differ- 

 ent sires, 142 



Tympanum, 70 



u 



Umbilical arteries, 73 



Umbihcal cord, 65-6, 68, 73-4, 78-9, 



85 

 Umbilical vein, 73 

 Umbihcal vesicle, 64 

 Umbilical vessels, 73 

 Umbihcus, 74 



Unemployment problem, 147 

 Ungulata (ungulate mammals), 25, 



89 

 Unicellular forms, 1 

 " Unnatural " practices, 148-9 

 Urea, 67 

 Urethra, 20, 22, 24, 33, 69, 70 



Urinary organs, 70 



Urogenital opening, 16 ; passage, 

 20 



Uterine cavity, 43, 60, 70 



Uterine contractions, mechanism of, 

 110, 114 ; influence of ovary 

 on, 109-10 



Uterine cycle, 51 



Uterine glands, 47. 50-3. 71-2. 94 



Uterine milk, 31, 34 



Uterine mucosa, 44, 46. 48, 51-4, 

 70-2, 74-5, 81. 101-2, 106 ; ovarian 

 influence on, 81 



Uterine muscles, 74, 77. 80. 94 



Uterine vessels, 72 



Uterus, 25, 26, 38, 42, 44-7, 51, 98, 

 128, 139, 142, 144; absorption 

 of semen, 40 ; and corpus luteum, 

 50, 108, 113 ; and ovulation, 50 ; 

 at parturition, 77, 80. 81 ; at 

 parturition, comparative weight 

 of, 74, 82 ; at parturition of 

 lower mammals, 85 : during 

 (estrous cycle, 48 ; in free- 

 martins, 131 ; in ovariotomy, 

 94 ; in pregnancy, 44, 113 ; in 

 pseudo-pregnancy, 44, 46, 113 ; 

 removal of, 98 ; section of, 30, 

 31 ; structure of, 30 : virgin, in 

 man, 30, 74, 80, 81 



V 



Vacuoles, 2 



Vagina, 30, 38, 48, 52, 80, 82, 128, 

 143 ; absorption of semen by, 40 ; 

 at parturition, 77 ; cycle of, 49 ; 

 during cestrous cycle, 48 ; struc- 

 ture of, 32 



Vaginal plug, 106 



Varicose veins, 75 



Variation, 115, 123-4 



Vas deferens, 16, 17, 19, 20, 38, 128, 

 131 ; cutting of, 51, 93, 112 



Vasa efferentia, 17, 19, 38 



Vasectomy, 93, 102, 106, 112-13 



Vasomotor changes at menopause, 

 59 



