238 ON THE NATURAL HISTORY 



" If the word ' Pongo ' be of African origin, it is pro- 

 bably a corruption of the word Mpongwe, the name of the 

 tribe on the banks of the Gaboon, and hence applied to 

 the region they inhabit. Their local name for the Chim- 

 panzee is Ench-eko, as near as it can be Anglicized, from 

 which the common term ' Jocko ' probably comes. The 

 Mpongwe appellation for its new congener is Enge-ena, 

 prolonging the sound of the first vowel, and slightly 

 sounding the second. 



" The habitat of the Enge-ena is the interior of lower 

 Guinea, whilst that of the Enche-eko is nearer the sea- 

 board. 



" Its height is about five feet ; it is disproportionately 

 broad across the shoulders, thickly covered with coarse 

 black hair, which is said to be similar in its arrangement 

 to that of the Enche-eko ; with age it becomes grey, which 

 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 

 scattered grey 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 

 moving 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 Ench6- 

 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. . . . 



