RELATIONS OF ANTHEOPOMOEPHA TO MAN. 487 



slender, and terminates in a narrow and elongated glans. 

 TKe testes are very large, and the communication between 

 the tiinica vaginalis and the peiitonenm is completely closed. 

 The glans penis of the GoriUa is button-shaped. In the 

 Oraug it is cyliridrical, and the testes are situated close to the 

 inguinal canal, which has been found open on one side, and 

 closed on the other. An os penis is developed in the males. 



The females have the clitoris large, and the iiteiiis, which 

 is undivided into cornua, resembles that of the human sub- 

 ject. The i^lacenta of a Chimpanzee foetus. Hi inches long, 

 was simple, rounded, oh inches in diameter, and 0'6 inch 

 thick in the centre. The umbilical cord was inserted near 

 one of its edges. 



The proportions of the limbs to one another and to the 

 body do not sensibly change after birth; but the body, 

 limbs and jaws, enlarge to a much greater extent than the 

 brain-case. 



The amount of variation in the characters of the skull 

 among the Chimpanzees, Gorillas, and Orangs, is exceed- 

 ingly remarkable, especially if taken in connection with 

 their very limited areas of distribution. 



Of the four genera of the Anthropomorpha, the Gibbons 

 are obviously most remote from Man, and nearest to the 

 Cynopitliecini. 



The Orangs come nearest to Man in the number of the 

 ribs, the form of the cerebral hemispheres, the diminution 

 of the occipito-temporal sulcus of the brain, and the ossified 

 styloid process ; but they differ from him much more widely 

 in other respects, and especially in the limbs, than the Go- 

 rilla and the Chimpanzee do. 



The Chimpanzee approaches Man most closely in the 

 character of its cranium, its dentition, and the proportional 

 size of the arms. 



The Goi-illa, on the other hand, is more Man-like in the 

 proportions of the leg to the body, and of the foot to the 

 hand ; further, in the size of the heel, the cxirvature of the 

 spine, the form of the pelvis, and the absolute capacity of 

 the cranium. 



