ansion of the frontal sinuses,
which are appendages of the air-passages, also indicates an unusual
force and power of endurance in the movements of the body, as may
be concluded from the size of all the ridges and processes for the
attachment of the muscles or bones. That this conclusion may be drawn
from the existence of large frontal sinuses, and a prominence of the
lower frontal region, is confirmed in many ways by other observations.
By the same characters, according to Pallas, the wild horse is
distinguished from the domesticated, and, according to Cuvier, the
fossil cave-bear from every recent species of bear, whilst, according
to Roulin, the pig, which has become wild in America, and regained a
resemblance to the wild boar, is thus distinguished from the same animal
in the domesticated state, as is the chamois from the goat; and,
lastly, the bull-dog, which is characterised by its large bones and
strongly-developed muscles from every other kind of dog. The estimation
of the facial angle, the determination of which, according to Professor
Owen, is also difficult in the great apes, owing to the very prominent
supra-orbital ridges, in the present case is rendered still more
difficult from the absence both of the auditory opening and of the nasal
spine. But if the proper horizontal position of the skull be taken from
the remaining portions of the orbital plates, and the ascending line
made to touch the surface of the frontal bone behind the prominent
supra-orbital ridges, the facial angle is not found to exceed 56
degrees.* ([Footnote] *Estimating the facial angle in the way suggested,
on the cast I should place it at 64 degrees to 67 degrees.--G. B.)
Unfortunately, no portions of the facial bones, whose conformation is
so decisive as regards the form and expression of the head, have been
preserved. The cranial capacity, compared with the uncommon strength
of the corporeal frame, would seem to indicate a small cerebral
development. The skull, as it is, holds about 31 ounces of millet-seed;
and as, from the proportionate size of the wanting bones, the whole
cranial cavity should have about 6 ounces more added, the contents, were
it perfect, may be taken at 37 ounces. Tiedemann assigns, as the cranial
contents in the Negro, 40, 38, and 35 ounces. The cranium holds rather
more than 36 ounces of water, which corresponds to a capacity of 1033.24
cubic centimetres. Huschke estimates the cranial contents of a Negress
at 1127