140 



ARBOREAL MAN 



diminish, and the dwindling of the uterine cornua is 

 harmonious with the diminishing family. Finally, when, 

 in arboreal life, the begetting of a single offspring is the 

 long-established habit, the cornua disappear altogether, 

 and the single offspring is lodged in the single median 



Fig. 51. — The Type of Uterus associated with Multiple 

 Pregnancies. Small Uterine Chamber, Large Uterine 

 Cornua, Small Falloppian Tubes. 



The diagram is taken from the uterus of the dog. 



chamber — the uterine bod3\ In the higher Primates, 

 therefore, and in other typical arboreal animals such as 

 the Sloths, the uterine cornua have practically disap- 

 peared, and the genital tract consists of (1) the Falloppian 

 tubes, or egg ducts, leading into (3) the uterine body, 

 which in turn opens to the vagina, and so to the exterior 



