toe is approached in some men, who have great mobility in this
organ, and can use it for grasping.
In regard to the brain, the organ of the mind, the difference between
the higher apes and man is almost solely one of comparative size, the
lower intelligence of the apes being indicated by the smaller size of
their brains. The largest ape brain is scarcely half the size of the
smallest human brain. But anatomically they are nearly identical. All
the structural features of the brain are common to both, and the details
are largely filled out in the anthropoid apes, the convolutions being
all present and the pattern of arrangement the same. The brain of the
orang may be said to be like that of man in all respects except size and
the greater symmetry of its convolutions, which are less complicated
with minor convolutions than in man. In truth, the difference between
the brains of man and the orang is almost insignificant as compared with
the difference between those of the orang and the lowest apes. Mr. E. W.
Taylor, who has recently made an exhaustive study of the minute anatomy
of the brain of the chimpanzee, remarks, "The similarity between the
brain of the anthropoid apes and of man is one of the most singular and
interesting facts of which we have knowledge."
In any attempt, then, to consider the origin of man from the point of
view of evolution, we are irresistibly drawn to the ape tribe as the
next lower link in the long chain of development, and are led to
consider the characteristics of the apes as the intermediate stage
between the quadruped and the biped, the bridge crossing this great gulf
in organic development. This is by no means to suggest that some one of
the existing anthropoid apes is the direct ancestor of man. Such an idea
has never been entertained by scientists. These animals cannot even
fairly be considered as brothers to man's ancestor, but must be looked
upon as more or less distant cousins, with a physical organization less
favorable to high development than that of man. Man's ancestry lies much
farther back in time, and his progenitor must have been constituted
differently from any of the existing large apes.
In the ape tribe we are able to trace nearly every step by which the
gulf between quadruped and biped has been crossed, from the quadrupedal
baboon to the nearly erect gibbon. And in seeking to follow this
development through its successive stages, the first point to be
considered is how
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