62 THE NATURAL HISTORY OF 



fact has given rise to the report that both animals are seen 

 of different colours. 



Head. The prominent features of the head are, the 

 great width and elongation of the face, the depth of the 

 molar region, the branches of the lower jaw being very 

 deep and extending far backward, and the comparative 

 smallness of the cranial portion ; the eyes are very large, 

 and said to be like those of the Enche-eko, a bright hazel ; 

 nose broad and flat, slightly elevated towards the root ; 

 the muzzle broad, and prominent lips and chin, with scat- 

 tered gray hairs ; the under lip highly mobile, and capable 

 of great elongation when the animal is enraged, then 

 hanging over the chin ; skin of the face and ears naked, 

 and of a dark brown, approaching to black. 



The most remarkable feature of the head is a high 

 ridge, or crest of hair, in the course of the sagittal suture, 

 which meets posteriorly with a transverse ridge of the 

 same, but less prominent, running round from the back of 

 one ear to the other. The animal has the power of mov- 

 ing the scalp freely forward and back, and when enraged 

 is said to contract it strongly over the brow, thus bringing 

 down the hairy ridge and pointing the hair forward, so as 

 to present an indescribably ferocious aspect. 



Neck short, thick, and hairy ; chest and shoulders very 

 broad, said to be fully double the size of the Enche-ekos ; 

 arms very long, reaching some way below the knee the 

 fore-arm much the shortest ; hands very large, the thumbs 

 much larger than the fingers. . ... . 



The gait is shuffling ; the motion of the body, which 

 is never upright as in man, but bent forward, is somewhat 

 rolling, or from side to side. The arms being longer than 

 the Chimpanzee, it does not stoop as much in walking ; 

 like that animal, it makes progression by thrusting its 

 arms forward, resting the hands on the ground, and then 



