"The tribe from which our knowledge of the animal is derived, and whose
territory forms its habitat, is the 'Mpongwe', occupying both banks of
the River Gaboon, from its mouth to some fifty or sixty miles
upward....

"If the word 'Pongo' be of African origin, it is probably 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 Chimpanzee is 'Enche-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 gray hairs; the under lip