_Cebus vellerosus_, Is. Geoffr., Cat. Méth. Primates, p. 44 (1851,
part.); Gray, Cat. Monkeys Brit. Mus., p. 49 (1870).
_Cebus frontatus_, Schl., Mus. Pays Bas, vii., p. 206 (1876, part.).
CHARACTERS.--Hairs of crown short; those on the side of the dark and narrow
crown-spot, produced on the sides into two horns or crests. Fur thick and
long, mingled with still longer glancing hairs; general colour
blackish-brown; top of head, nape of neck, and whiskers black. (_Gray._)
DISTRIBUTION.--Brazil.
The following species has been described by Dr. Gray, but very little, if
anything, is known of its habits or of the exact locality in which it
lives.