Royal College of Surgeons, the latter from the photograph of the cast of a Chimpanzee’s skull, which illustrates the paper by Mr. Marshall ‘On the Brain of the Chimpanzee’ in the Natural History Review for July, 1861. The sharper definition of the lower edge of the cast of the cerebral chamber in the Chimpanzee arises from the circumstance that the tentorium remained in that skull and not in the Man’s. The cast more accurately represents the brain in Chimpanzee than in the Man; and the great backward projection of the posterior lobe, of the cerebrum of the former, beyond the cerebellun, is cospicuous.

ABSTRACT

And the error is the less excusable, as it must become apparent to every one who examines a section of the skull of any ape above a Lemur, without taking the trouble to make a cast of it. For there is a very marked groove in every such skull, as in the human skull-which indicates the line of attachment of what is termed the tentorium-a sort of parchment-like shelf, or partition, which, in the recent state, is interposed between the cerebrum and cerebellum, and prevents the former from pressing upon the latter, (see Fig. 17).