_Perodicticus calabarensis_, Smith, Proc. Roy. Phys. Soc., Edinb., 1860,
p. 172, figs. 1, 2.
_Arctocebus calabarensis_, J. E. Gray, P. Z. S., 1863, p. 150; Huxley, P.
Z. S., p. 314, pl. 28 (1864).
_Nycticebus calabarensis_, Schlegel, Mus. Pays Bas, vii., p. 287 (1876).
[Illustration: Fig. 7. Hand and Foot of _P. calabarensis_ (after Huxley, P.
Z. S., 1864, p. 319).]
CHARACTERS.--Hair long, wool-like; face, hands, and feet thinly haired.
Head 2½ inches long, tapering in front; muzzle prominent and blunt; ears
large, pointed, and projecting above the level of the head, with short
hairs, two lamellæ inside, and marginal tufts; neck short; hind-limbs
slightly larger and {28}longer than the fore-limbs; hands smaller than the
feet; thumb thick, with a tubercle at base; the wrist-bone of the very
rudimentary index-finger supporting two rudimentary finger-bones; third
finger not parallel to fourth and fifth; the fourth longest (Fig. 7). Great
toe with a tubercle at its base, opposable. Tail ¼ inch long, hidden in the
fur of the body.
Fur grey at base of hairs, fawn-coloured farther up, and tipped with dark
brown, uniform over the body and limbs; face darker; sides of head lighter;
line from brow down the nose white. No vibrissæ on face and no eyebrows;
chin, throat, inner surface of limbs, and under side of body,
greyish-white.
Posterior upper molar nearly equal to posterior pre-molar, with the hind
inner cusp of the crown rudimentary. Lower incisors not visible beyond the
lip, cingulate; posterior molar five-cusped and relatively larger than in
the next species (_P. potto_). Bony palate with large perforations behind
the incisors. Intestines, 40 inches long; cæcum, 2½ inches.
DISTRIBUTION.--The "Angwantibo," as this species is called, is known only
from Old Calabar, on the west coast of Africa.