ebrum is
indispensable. If the sensuous impressions experienced anew in each case
by each human being, and the original movements, were sufficient without
the development of the cerebral convolutions and of the gray cortex,
then these microcephalous beings, upon whom the same impressions
operated as upon other new-born children, must have had better brains
and must have learned more. But the brain, notwithstanding the
peripheral impressions received in seeing, hearing, and feeling, could
not grow, and so the rudimentary human child could not learn anything,
and could not even form the ideas requisite for articulate voluntary
movement, or combine these ideas. Only the motor centers of lower rank
could be developed.

In peculiar contrast with these cases of genuine microcephaly stands the
exceedingly remarkable case, observed by Dr. Rudolf Krause (Hamburg), of
a boy whose brain is not at all morbidly affected or abnormally small,
but exhibits decidedly the type of the brain of the ape. The discoverer
reported upon it to the Anthropological Society ("Correspondenzblatt
a.a. O., S. 132-135) the following facts among others:

"The skull and brain belonged to a boy who was born on the 4th
of October, 1869, the last of four children. Paul was scrofulous
from his youth. He did not get his teeth until the end of his
second year, and they were quite brown in color and were soon
lost. According to the statement of Paul's mother, he had
several successive sets of teeth. It was not until the fifth
year that he learned to walk. He was cleanly from the third
year, but not when he felt ill. His appetite was always good up
to his last sickness of four weeks. His sleep was habitually
undisturbed. He was of a cheerful temperament, and inclined to
play; as soon as he heard music he would dance, and sing to the
music in rather unmelodious tones. When teased he could be very
violent; he would throw anything he could lay his hands on at
the head of the offender. He liked the company of others,
especially of men. By the time he was four years old he had
learned to eat without help. Paul was very supple, was fond of
climbing, and had great strength in his arms and hands
especially; these had actually a horny appearance, and thus
reminded one of the hands of the chimpanzee. He could sit on the
ground with his legs wide apart. His gait was uncertain, and he
was