She rolled on the ground, sometimes on her back, sometimes on her belly,
and bit everything within reach. A young gibbon (_Hylobates syndactylus_)
in a passion has been described[16] as behaving in almost exactly
the same manner.
The lips of young orangs and chimpanzees are protruded,
sometimes to a wonderful degree, under various circumstances.
They act thus, not only when slightly angered, sulky,
or disappointed, but when alarmed at anything--in one instance,
at the sight of a turtle,[17]--and likewise when pleased.
But neither the degree of protrusion nor the shape of
the mouth is exactly the same, as I believe, in all cases;
and the sounds which are then uttered are different.
The accompanying drawing represents a chimpanzee made sulky
by an orange having been offered him, and then taken away.
A similar protrusion or pouting of the lips, though to a much
slighter degree, may be seen in sulky children.
[15] Brehm remarks (`Thierleben,' s. 68) that the eyebrows of the _Inuus
ecaudatus_ are frequently moved up and down when the animal is angered.
[16] G. Bennett, `Wanderings in New South Wales,' &c. vol.
ii. 1834, p.
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