it becomes gray, which fact has given rise to the report that both
animals are seen of different colors.

"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 _Enché-eko_, a bright hazel; nose
broad and flat, slightly elevated toward the root; the muzzle broad,
and prominent lips and chin, with scattered 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
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.

[Illustration: THE GORILLA.]

"Neck short, thick, and hairy; chest and shoulders very broad, and
said to be fully double the size of the _Enché-ekos;_ arms very long,
reaching some way below the knee--the forearm much the shortest; hands
very large, the thumbs much larger than the fingers....