Messrs. Savage and Wyman[19]
state that the scalp can be freely moved backwards and forwards,
and that when the animal is excited it is strongly contracted;
but I presume that they mean by this latter expression that the scalp
is lowered; for they likewise speak of the young chimpanzee,
when crying out, as having the eyebrows strongly contracted."
The great power of movement in the scalp of the gorilla,
of many baboons and other monkeys, deserves notice in relation
to the power possessed by some few men, either through reversion
or persistence, of voluntarily moving their scalps.[20]
_Astonishment, Terror_--A living fresh-water turtle was placed at my request
in the same compartment in the Zoological Gardens with many monkeys;
and they showed unbounded astonishment, as well as some fear.
This was displayed by their remaining motionless, staring intently
with widely opened eyes, their eyebrows being often moved up and down.
Their faces seemed somewhat lengthened. They occasionally raised themselves
on their hind-legs to get abetter view. They often retreated a few feet,
and then turning their heads over one shoulder, again stared intently.
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