eto-occipitalis_, a formation
that, according to Gratiolet, exists in many apes. The _gyrus
temporalis superior_ is greatly reduced on both sides, and has
an average breadth of only five millimetres; it is the one
peculiarity that recalls emphatically the brain of the
chimpanzee, which always has this reduced upper temporal
convolution.

"We have here, then, a brain that scarcely deviates from the
normal brain in volume, that possesses all the convolutions and
fissures, seeming, perhaps, richer than the average brain in
convolutions, and that is in every respect differentiated; and
notwithstanding all this it approximates, in its whole
structure, to the simian rather than to the human type. Had the
brain been placed before me without my knowing its origin, I
should have been perfectly justified in assigning this brain to
an anthropoid ape standing somewhat nearer to man than does the
chimpanzee."

No second case of this sort has thus far been observed.

C.

REPORTS CONCERNING THE PROCESS OF LEARNING TO SEE, ON THE PART OF
PERSONS BORN BLIND, BUT ACQUIRING SIGHT THROUGH SURGICAL TREATMENT. ALSO
SOME CRITICAL REMARKS.

I. THE CHESSELDEN CASE.

The following extracts are taken from the report published by Will.
Chesselden in the "Philosophical Transactions for the Months of April,
May, and June, 1728" (No. 402, London, pp. 447-450), or the
"Philosophical Transactions from 1719 to 1733, abridged by J. Eames and
J. Martyn" (vii, 3, pp. 491-493, London, 1734):

"Though we say of the gentleman that he was blind, as we do of
all people who have ripe cataracts, yet they are never so blind
from that cause but that they can discern day from night, and,
for the most part, in a strong light distinguish black, white,
and scarlet; but they can not perceive the shape of anything....
And thus it was with this young gentleman, who, though he knew
these colors asunder in a good light, yet when he saw them after
he was couched, the faint ideas he had of them before were not
sufficient for him to know them by afterward, and therefore he
did not think them the same which he had known before by those
names....

"When he first saw, he was so far from making any judgment about
distances, that he thought all objects whatever touched his eyes
(as he expressed it) as what he felt did his skin, and thought
no ob