d than is usual, in
consequence of which the _lamina cribrosa_ of the ethmoid bone
lies deeper, and room is given for the well-known conformation
of the ethmoidal process in the brain. The cerebral convolutions
are plainly marked upon the inner surface of the cranium. The
facial cranium shows no deviations. There is no prognathism. The
formation of the teeth alone is irregular; one pre-molar tooth
is lacking above and below in the jaw, and, in fact, there is no
place for it. The incisors and the pre-molar teeth are
undergoing change.

"The two cerebral hemispheres are asymmetrical; in the region
where the parieto-occipital fissure is situated on the left
hemisphere, the two hemispheres diverge from each other and form
an edge which curves outward and backward, so that the
cerebellum remains uncovered. On the lower surface of the
frontal lobes there exists a strongly marked ethmoidal
prominence. Neither of the fissures of Sylvius is quite closed,
the left less so than the right; the operculum is but slightly
developed, and the island of Reil lies with its fissures almost
entirely uncovered. This conformation reminds us throughout of
the brain of the anthropoid apes. The two _sulci centrales sive
fissurae Rolandi_ run straight to the border of the hemisphere,
less deeply impressed than is normally the case, without forming
an angle with each other. Very strongly and deeply impressed
_sulci praecentrales_ seem to serve as substitutes for them. The
_sulcus interparietalis,_ which begins farther outward than in
the ordinary human being, receives the _sulcus
parieto-occipitalis_--a structure in conformity with the typical
brain of the ape. The _sulcus occipitalis transversus_, which is
generally lightly stamped in man, extends here as a deep fissure
across over the occipital lobe, thus producing a so-called
simian fissure, and the posterior part of the occipital lobe has
the appearance of an operculum. The _fissura calcarina_ has its
origin directly on the surface of the occipital lobe, does not
receive until late the _fissura parieto-occipitalis_, and goes
directly, on the right side, into the _fissura hippocampi_. This
abnormal structure also is typical for the brain of the ape.

"The _gyrus occipitalis primus_ is separated from the upper
parietal lobe by the _sulcus pari