Chimpanzee, but of all the anthropoid Apes.

By the investigations herein detailed, it became evident that the old
Chimpanzee acquired a size and aspect as different from those of the
young known to Tyson, to Buffon, and to Traill, as those of the old
Orang from the young Orang; and the subsequent very important
researches of Messrs. Savage and Wyman, the American missionary and
anatomist, have not only confirmed this conclusion, but have added many
new details.*

[footnote] *See "Observations on the external characters and
habits of the Troglodytes niger, by Thomas N. Savage, M.D.,
and on its organization by Jeffries Wyman, M.D.," 'Boston
Journal of Natural History', vol. iv., 1843-4; and
"External characters, habits, and osteology of Troglodytes
Gorilla," by the same authors, 'ibid'., vol. v., 1847.

One of the most interesting among the many valuable discoveries made by
Dr. Thomas Savage is the fact, that the natives in the Gaboon country
at the present day, apply to the Chimpanzee a name--"Enche-eko"--which
is obviously identical with the "Engeko" of Battell; a discovery which
has been confirmed by all later inquirers. Battell's "lesser monster"
being thus proved to be a veritable existence, of course a strong
presumption arose that his "greater monster," the 'Pongo,' would sooner
or later be discovered. And, indeed, a modern traveller, Bowdich, had,
in 1819, found strong evidence, among the natives, of the existence of a
second great Ape, called the 'Ingena,' "five feet high, and four across
the shoulders," the builder of a rude house, on the outside of which it
slept.