with the Canoe Indians of the Strait of Magellan and other human
tribes we could name, I think the former have decidedly the best
of it. There are millions of members of the human race who are
more loathsome and repulsive than wild apes.

The face of the chimpanzee is highly mobile, and the mouth, lips,
eyes and voice express the various emotions of the individual
with a degree of clearness and precision second only to the facial
expression of man himself. In fact, the face of an intelligent
chimpanzee or orang-utan is a fairly constant index of the state
of mind of the individual. In their turn, those enormously
expansive lips and keen brown eyes express contentment, doubt,
fear and terror; affection, disapproval, jealousy, anger, rage;
hunger and satiety; lonesomeness and illness.

The lips of the chimpanzee afford that animal several perfectly
distinct expressions of the individual's mind and feelings. While
it is not possible to offer a description of each which will
certainly be recognizable to the reader, the two extremes will at
least be appreciated. When coaxing for food, or attention, the
lips are thrust far out beyond the teeth, and formed into a funnel
with the small end outermost. When the chimpanzee flies into a
rage at some real or fancied offense, the snarling lips are drawn
back, and far up and down, until the teeth and gums are fully
exposed in a ghastly threat of attack. At the same time, the voice
gives forth shrill shrieks of rage, correctly represented by the
syllable "Ee-ee-ee!", prolonged, and repeated with great force,
three or four times. On such occasions as the latter, the
offending party must look out for himself, or he may be roughly
handled.