Evening star., 1924-11-01

rious life forms which have been an
cestors of man. Up to the third
month the brain in the unborn body
is physically virtually identical with
the brain of some lower forms Of
mammals. At the end of the third
month begins the rapid development
of the upper brain, the home of the
thinking processes, until a very SINH
lar organ to the brain of a primate
such as a manlike ape is developed
Then comes another rapid develop
ment into the brain of a human being
with which the child is born.
ellis Found In Neck.
There are sometimes slits in the
neck of the human embryo which
cannot be considered other than gills
such as are found in young fishes.
DR.. Hrdlicka said. These do not indi-
cate that men are descended from
fishes, but that there is a possible
common ancestor of fish and men
somewhere in the dawn OF life and
that there is recapitulation Of this
creature in the lives of the young of
both species.
After the eighth or tenth week of
embryonic life. he pointed out, there
is a distinct projection which can be
considered only as the remnant of an
ancient tail. Sometimes this survives
even up to birth, and DR.. Hrdlicka
made known the sensational fact that
there are authentic instances of the
tail continuing after birth and even
into adult life-actually men with
tails.
Even more startling was Dr. Hrd-
licka's statement that once or twice
in a lifetime a physician may come
across bodily peculiarities, which can
be considered only as actual reversals
of survivals from far beyond ape or
Erimate into a misty past where 1t is
impossible for scientists to follow.
Men With Dog Teeth.
In southern France, he said. human
beings with fur dog teeth-that is,
with six incisors instead Of the human
four are not uncommon. These are
revcrsals to this extent to some form
preceding humanity which had six in
cisorS
He exhibited a human arm bone on
which had grown a hooklike bone
process more than inches long. and
compared it with a similar bone OF a
hyena- on which the process con-
stituted a complete bridge. Now this
process in certain OF the lower ami
mails serves to protect an artery and
nerve. In the primates it became
great many generations. Now it is
reappearing again in civilized white
men. Occasionally it is found in a
monkey or an anthropoid ape, but it
exists in l per cent OF all white men
and has been found in per cent of
white insane. This. is perhaps the
most remarkable instance on record
Of reversal. There is one human
bone on exhibit, Dr. Hrdlicka said,
hny ho g.
arch-the same as in the hyea-
He pointed to the appendix as the
survival in man OF an organ which
has lost it's usefulness and become a
dangerous overload, although even as
close to man as the monkeys 1t serves
very definite and useful purpose.
Evidence Under Microscope.
DR.. Hrdlicka presented the bulk Of
microscopic evidence of the relation
OF man to mammal. The blood is
composed of three components, the
red and white corpuscles and the
liquid part, or the plasma. Counting
corpuscles and considering their
shape and size in the blood of man
and anthropoid. he said, it would be
very difficult to tell cubic centime-
ter of human blood from the same
amount of chimpanzee blood
Then he considered the Independent
body cells, four or five thousand Of
which laid side by side would not
constitute any appreciable distance.
In each of these cells are peculiar
black lines known as chromosomes
which have a whole life history of
their own. Now, DR.. Hrdlicka said,
investigation has shown that the bod
lily similarity of man and mammal ex-
tends so far as the actual number
and shape Of chromosomes in individ-
ual cells.
All the finer bodily processes, such
as metabolism or assimilation Of ac-