turalists. Suffice it to say, that the Orangs and the
Gibbons constitute the distinct genera, 'Simia' and 'Hylobates'; while
the Chimpanzees and Gorillas are by some regarded simply as
distinct species of one genus, 'Troglodytes'; by others as distinct
genera--'Troglodytes' being reserved for the Chimpanzees, and 'Gorilla'
for the Enge-ena or Pongo.

Sound knowledge respecting the habits and mode of life of the man-like
Apes has been even more difficult of attainment than correct information
regarding their structure.

Once in a generation, a Wallace may be found physically, mentally, and
morally qualified to wander unscathed through the tropical wilds of
America and of Asia; to form magnificent collections as he wanders;
and withal to think out sagaciously the conclusions suggested by his
collections: but, to the ordinary explorer or collector, the dense
forests of equatorial Asia and Africa, which constitute the favourite
habitation of the Orang, the Chimpanzee, and the Gorilla, present
difficulties of no ordinary magnitude: and the man who risks his life by
even a short visit to the malarious shores of those regions may well
be excused if he shrinks from facing the dangers of the interior; if he
contents himself with stimulating the industry of the better seasoned
natives, and collecting and collating the more or less mythical reports
and traditions with which they are too ready to supply him.

In such a manner most of the earlier accounts of the habits of the
man-like Apes originated; and even now a good deal of what passes
current must be admitted to have no very safe foundation. The best
information we possess is that, based almost wholly on direct European
testimony respecting the Gibbons; the next best evidence relates to
the Orangs; while our knowledge of the habits of the Chimpanzee and the
Gorilla stands much in need of support and enlargement by additional
testimony from instructed European eye-witnesses.

It will therefore be convenient in endeavouring to form a notion of what
we are justified in believing about these animals, to commence with the
best known man-like Apes, the Gibbons and Orangs; and to make use of the
perfectly reliable information respecting them as a sort of criterion of
the probable truth or falsehood of assertions respecting the others.

Of the GIBBONS, half a dozen species are found scattered over the
Asiatic islands, Java, Sumatra, Borneo, and through Malacca, Siam,
Arracan, and