dog.

His hearing was very acute, but the sense of vision seemed to be less
perfect. The under lip was the great organ of touch, and played a very
important part in drinking, being thrust out like a trough, so as
either to catch the falling rain, or to receive the contents of the half
cocoa-nut shell full of water with which the Orang was supplied, and
which, in drinking, he poured into the trough thus formed.

In Borneo the Orang-Utan of the Malays goes by the name of "Mias" among
the Dyaks, who distinguish several kinds as 'Mias Pappan', or 'Zimo',
'Mias Kassu', and 'Mias Rambi'. Whether these are distinct species,
however, or whether they are mere races, and how far any of them are
identical with the Sumatran Orang, as Mr. Wallace thinks the Mias Pappan
to be, are problems which are at present undecided; and the variability
of these great apes is so extensive, that the settlement of the question
is a matter of great difficulty. Of the form called "Mias Pappan,"
Mr. Wallace [23] observes, "It is known by its large size, and by the
lateral expansion of the face into fatty protuberances, or ridges, over
the temporal muscles, which has been mis-termed 'callosities', as they
are perfectly soft, smooth, and flexible. Five of this form, measured
by me, varied only from 4 feet 1 inch to 4 feet 2 inches in height, from
the heel to the crown of the head, the girth of the body from 3 feet to
3 feet 7 1/2 inches, and the extent of the outstretched arms from 7 feet
2 inches to 7 feet 6 inches; the width of the face from 10 to 13
1/4 inches. The colour and length of the hair varied in different
individuals, and in different parts of the same individual; some
possessed a rudimentary nail on the great toe, others none at all; but
they otherwise present no external differences on which to establish
even varieties of a species.

"Yet, when we examine the crania of these individuals, we find
remarkable differences of form, proportion, and dimension, no two being
exactly alike. The slope of the profile, and the projection of the
muzzle, together with the size of the cranium, offer differences as
decided as those existing between the most strongly marked forms of the
Caucasian and African crania in the human species. The orbits vary in
width and height, the cranial ridge is either single or double, either
much or little developed, and the zygomatic aperture varies considerably
in size. This variation in the proportions of the crania e