48 
JOURNAL OF MAMMALOGY 
In many of the anatomical characters, the orang-utan does not so 
much resemble man as does his African relatives of the genus Pan. 
He differs from the chimpanzee in twenty-three characters. In twenty 
of these the chimpanzee is more like man than the orang, while in but 
three is the orang more like man than the chimpanzee. These three 
characters are: 
1st. The number of pairs of ribs and number of dorsal vertebrse, 
there being twelve in the orang, as in man, while in the chimpanzee and 
gorilla there are thirteen. 
2nd. The absence of super ciliaiy crests — prominent bony ridges 
protruding out over the eyes, which so disfigure the face of the gorilla 
and are well marked in the chimpanzee. 
3rd. The form of the cerebral hemispheres. In the orang they are 
much more like those of man, than are those of the chimpanzee. The 
orang has a straight full forehead, while the forehead of the chimpanzee 
is considerably receding. 
In disposition the orang-utan is much quieter and less obtrusive 
than the chimpanzee. Doctor Hornaday tells me that while he was 
in their native forests and jungles, he never saw one on the ground, 
unless he had been wounded or driven down by man. Even when 
thirsty he does not come to the ground to drink, but climbs out on the 
limb of a tree overhanging a stream or pool, until his weight bends the 
branch down so that he may reach the water. In captivity this great 
ape is much inclined to sit in a corner of his cage, motionless and, voice- 
less. But when captured young he takes fairly well to captivity, be- 
comes friendly and attached to those who feed and care for him, and 
seems to enjoy human society. 
About fifteen years ago I was traveling with the Gus Lambrigger 
Animal Show as naturalist and lecturer. At the time of which I speak, 
we had a young orang which had come to us only about three weeks 
earlier. One afternoon, having finished a lecture, I sat down in a 
chair with my back to the stage or platform on which the small por- 
table cages were arranged. I was some little distance from the oranges 
cage. But presently I felt two long hairy arms encircle my neck and 
a strawberry-blond youngster climbed down into my lap and proceeded 
to make himself very much at home. He had himself opened his cage 
door and walked along the stage in front of the other cages until he 
could climb over on my back. 
I have seen the orangs in the New York Zoological Park follow their 
keeper about on the lawn, and when he would attempt to run away from 
