orthognathism gradually diminish, and are replaced by dolichocephaly
and prognathism, less, however, on the American Continent (throughout
the whole length of which a rounded type of skull prevails largely, but
not exclusively)* than in the Pacific region, where, at length, on the
Australian Continent and in the adjacent islands, the oblong skull, the
projecting jaws, and the dark skin reappear; with so much departure, in
other respects, from the Negro type, that ethnologists assign to these
people the special title of 'Negritoes.'

[footnote] *See Dr. D. Wilson's valuable paper "On the
supposed prevalence of one Cranial Type throughout the
American aborigines."--'Canadian Journal', vol. ii., 1857.

The Australian skull is remarkable for its narrowness and for the
thickness of its walls, especially in the region of the supraciliary
ridge, which is frequently, though not by any means invariably, solid
throughout, the frontal sinuses remaining undeveloped. The nasal
depression, again, is extremely sudden, so that the brows overhang and
give the countenance a particularly lowering, threatening expression.
The occipital region of the skull, also, not unfrequently becomes less
prominent; so that it not only fails to project beyond a line drawn
perpendicular to the hinder extremity of the glabello-occipital line,
but even, in some cases, begins to shelve away from it, forwards,
almost immediately. In consequence of this circumstance, the parts of
the occipital bone which lie above and below the tuberosity make a much
more acute angle with one another than is usual, whereby the hinder
part of the base of the skull appears obliquely truncated. Many
Australian skulls have a considerable height, quite equal to that of
the average of any other race, but there are others in which the cranial
roof becomes remarkably depressed, the skull, at the same time,