Man's Place in Nature, and Other EssaysHuxley, Thomas Henry
Science
Man's Place in Nature, and Other Essays
Huxley, Thomas Henry
Apes; Ethnology; Human beings -- Origin; Indo-Europeans
The cranium is of unusual size, and of a long elliptical form. A most
remarkable peculiarity is at once obvious in the extraordinary
development of the frontal sinuses, owing to which the superciliary
ridges, which coalesce completely in the middle, are rendered so
prominent, that the frontal bone exhibits a considerable hollow or
depression above, or rather behind them, whilst a deep depression is
also formed in the situation of the root of the nose. The forehead is
narrow and low, though the middle and hinder portions of the cranial
arch are well developed. Unfortunately, the fragment of the skull that
has been preserved consists only of the portion situated above the roof
of the orbits and the superior occipital ridges, which are greatly
developed, and almost conjoined so as to form a horizontal eminence. It
includes almost the whole of the frontal bone, both parietals, a small
part of the squamous and the upper-third of the occipital. The recently
fractured surfaces show that the skull was broken at the time of its
disinterment. The cavity holds 16,876 grains of water, whence its
cubical contents may be estimated at 57.64 inches, or 1033.24 cubic
centimetres. In making this estimation, the water is supposed to stand
on a level with the orbital plate of the frontal, with the deepest notch
in the squamous margin of the parietal, and with the superior
semicircular ridges of the occipital. Estimated in dried millet-seed,
the contents equalled 31 ounces, Prussian Apothecaries' weight. The
semicircular line indicating the upper boundary of the attachment of the
temporal muscle, though not very strongly marked, ascends nevertheless
to more than half the height of the parietal bone. On the right
superciliary ridge is observable an oblique furrow or depression,
indicative of an injury received during life.[44] The coronal and
sagittal sutures are on the exterior nearly closed, and on the inside
so completely ossified as to have left no traces whatever, whilst the
lambdoidal remains quite open. The depressions for the Pacchionian
glands are deep and numerous; and there is an unusually deep vascular
groove immediately behind the coronal suture, which, as it terminates in
a foramen, no doubt transmitted a _vena emissaria_. The course of the
frontal suture is indicated externally by a slight ridge; and where it
joins the coronal, this ridge rises into a small protuberance. The
course of the sagittal suture is grooved, and above the angle of the
occipital bone the parietals are depressed.
mm.[45]
The length of the skull from the nasal
process of the frontal over the vertex
to the superior semicircular lines of the
occipital measures 303 (300)=12.0".
Circumference over the orbital ridges and
the superior semicircular lines of the
occipital 590 (590)=23.37" or 23".
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