MONKEYS. 
17 
inclnde not onlj the Gorilla, Chimpanzee, and Orang-utan, but 
also the Gibbons ; of all of which skeletons and skulls are 
exhibited. These Apes are tailless, and habitually assume a 
semi-erect position, using their disproportionally long arms to 
balance themselves by resting their knuckles on the ground. 
Several specimens of the Gorilla, AntliropopitJiecus gorilla ( 1 ), of 
various ages are exhibited in the front of the large centre case 
near the entrance to the gallery : conspicuous among them 
are two male specimens, whose projecting jaws, powerful 
teeth, and enormous brow-ridges give them a ferocious and 
savage appearance, wholly unlike that even of the lowest races 
of men or of their own young. 
On the left of case II are the Chimpanzees, Antliropopitliecus 
troglodytes ( 2 ), and in case I the Orang-utan, Simla satyrus ( 3 ), 
the former being closely allied and somewhat similar to the 
Gorilla, and also natives of the forests of Western and Central 
Fig. 10. 
Head of an adult Orang-utan {Simia satyrus). 
Africa. The large male Orang-utan shows the peculiar shape 
of the cheeks characteristic of some individuals, in which they 
are provided with thick wart-like protuberances. The Gibbons, 
Hylohates (Nos. 4 - 10 ), far less Man-like in every way, and 
c 
