582 SKELETON OF ORANG CHAP. 
The name Orang-Utan, now applied exclusively to the subject 
of the present description, was formerly applied also to the 
Chimpanzee, and to that animal, moreover, under the latinised 
version of Homo sylvestris. The Orang is a large and heavy Ape 
with a particularly protuberant belly and a melancholy expression. 
The face of the old male is broadened by a kind of callous expan- 
sion of naked skin at the sides. The colour of the animal is a 
Fic. 279.—Skeleton of Orang. Simia satyrus. (After de Blainville.) 
yellow brown, varying in the exact shade. The ears are parti- 
cularly small and graceful in appearance, pressed closely to the 
sides of the head. The head is very brachycephalic. The arms 
are very long, and when the animal is in the erect posture they 
reach as far as the ankle. The hallux is very short and usually 
destitute of a nail. It is a curious fact that the head of the thigh 
bone is unattached by a ligament to the socket of the pelvis in 
which it articulates, a state of affairs which may give the limb 
greater freedom in movement, but does not add to its strength ; 
