32 [FEBRUARY, 
Chimpanzee, is covered with short hair, except about the mouthand nose. The 
eyes are. moderately large, not prominent, of a dark chestnut color. The nose 
is broad, projecting a very little above the surface of the face. The ale are of 
thin and loose skin, capable of considerable distension. The mouth is very wide 
—the upper lip thick and hairless. The lower lip is a huge muscular flop, very 
distensible, which the animal drops over his chin when he is enraged, making his 
appearance exceedingly terrific. 
The ears are disproportionally small; they are hairless and stand out from the 
head. The muscles of the head are large, filling up a large part of the depressions 
between the ridges of the scull. The auricular group not large, but the tempo- 
ral, pterygoid and masseter muscles are of great strength, as might be supposed 
from the size of the inferior maxillary bone. The neck is of moderate length, 
but of great size, chiefly owing to the great length of the spinous processes of the 
several vertebre, but increased by the thickness of skin and length of hair. The 
circum ference of neck of this specimen was one foot and ten inches. 
The chest is narrow anteriorly and superiorly, but the contents of the entire 
cavity large, the lower end of the sternum projecting, and the sternal cartilages, ex- 
cept the first three, long. Vhe circumference of the chest, after the evacuation of the 
thorax and abdominal viscera, was four feet four inches. These viscera were 
evacuated by the natives before I received the body. All the muscles of the 
chest are largely developed, as are also all the muscles of the trunk. 
Thearms, it will be seen from the skeleton, are longer in proportion to the trunk, 
than are those of the small Chimpanzee, and are covered with a great weight of 
muscle. 
At the insertion af the deltoid the circumference in this specimen was one 
foot and four inches. The fore arm also is well supplied and covered with hair. 
The circumference of the wrist was one foot. 
The palm of the hand was large, while the fingers and thumb appeared small 
in proportion to the strength of the arm and fore arm. The palm and surface of 
the hand and fingers is covered with a thick black skin very little adherent to the 
true skin beneath, and in appearance resembling a leathern glove. It was re- 
moved entire, after maceration. The dorsal surface is covered with hair. The 
abdomen is large, and covered with lighter colored hair than the back. 
The genital organs, in both mule and female, are small, but in other respects 
similar to the smaller species. 
This animal is tailless and has no calosities. ‘The lower limbs are very short 
and slightly curved, but the most remarkable peculiarity is the size of the muscles 
which cover the femur, z. e. those having their origin on the anterior and inferior 
surface of the pelvis, and their insertion on the femur, together with the extensors 
and flexors of the legs. Their weight in this case was 18 lbs. The muscles of 
the leg and foot are not as fully developed as those of the thigh. In the shape of 
‘the foot he resembles other Orangs. The weight of this specimen was 170 lbs. 
without the thoracic, abdominal and pelvic viscera. 
Food. He feeds on the various roots and fruits found in the forest. He is, 
however, to some extent carnivorous, according to my most reliable information. 
When man is his prey, he devours him as he does animals that he can catch, 
though his sluggishness prevents his taking many animals as prey. 
The Ngena generally walks on all fours, with his feet placed flat on the ground, 
like a man, the thighs being flexed upon the leg, at an acute angle. 
The open hands are placed on the ground posteriorly and externally to the 
feet, the arms being nearly parallel to the axis of the body, and thus supporting 
the body posteriorly to the feet, and not anteriorly, as some have supposed. They 
act the part of hind rather than fore feet. AS 
The gait is an oscillating motion, caused by carrying forward the extremities 
of one side at a time, while the body is balanced to the opposite side; then alter- 
nately moving the other limbs with a return motion of the body. This is the 
movement I have seen in the young animal. Besides this gait, 1am led to be- 
lieve that in the forest he has a semi-erect posture, supporting himself by bushes 
and trees as they come in his way. 
He sometimes walks erect, and always rises on his feet when making an 
attack, though he approaches his antagonist in the stooping posture. 
