572 



EXTERNAL CHARACTERS OF GORILLA 



and it is a curious fact that the Siamang, which has a large 

 laryngeal pouch, is not excelled in this respect by species in 

 which this sac is not developed. 



pa. 



FIG. 273. Cerebrum of the Gibbon (Hylobates). (Lateral aspect.) c.c', c.c", Anterior 

 and posterior central convolution ; /, interparietal fissure ; fr, frontal lobe ; 

 f.s, Sylvian fissure ; oc, occipital lobe ; pa, parietal lobe ; s.c, fissure of Rolando ; 

 tp, temporal lobe; *, fron to - orbital fissure. (From Wiedersheim's Structure of 

 Man.) 



Of Gorillas, genus Gorilla, there is but one species, which must 

 apparently and rather unfortunately be called Gorilla gorilla. 



The misfortune is double : in the first place the repetition of 

 the same word as both generic and specific appellation is tiresome 

 to the ears and barbarous in its suggestion ; in the second place 

 it is now well known that the " Gorilla " of Hanno, observed by that 

 Carthaginian voyager on an island off the African coast, was not 

 a Gorilla at all as the word is now understood, but probably a 

 Baboon. The external aspect of this great Anthropoid is familiar 

 from many reproductions. The male, as is usual, is larger than 

 the female, and his characters are more pronounced. 



The face is naked and black, and the skin generally is deep 

 black, even at birth. The ear is comparatively small, and is 

 adpressed to the side of the head ; it is altogether more human 

 in form than that of the Chimpanzee, and this statement applies 

 also to the rudimentary condition of the muscles of the ear, 

 which are more rudimentary than in the Chimpanzee. The nose 

 has an obvious median ridge, and is thus pronounced as an external 

 feature ; the nostrils are very wide. The hands and feet are 

 short, thick, and broad ; the digits are webbed. In the foot the 

 heel is more apparent than in other Anthropoids. It is not, 



