78 ALLEN’S NATURALIST’S LIBRARY. 
THE HATTOCKS. . GENUS DMIXOCEBUS: 
Mixocebus, Peters, M. B. Akad. Berlin, 1874, p. 690. 
This genus contains but one species, whose characters are 
therefore those of the genus also. 
THE HATTOCK. MIXOCEBUS CANICEPS. 
Mixocebus caniceps, Peters, M. B. Akad. Berlin, 1874, p. 690, 
pli, pla: . (Skull) 
Characters.—Snout sharp, with a naked nose-pad; eyes very 
large; ears very short, rounded, higher than broad, scarcely 
appearing beyond the fur, and sparsely covered with short 
hair; limbs long, the digits with unkeeled nails; tail as long 
as the body, or slightly longer ; inter-maxillary bones more pro- 
minent than in the species of the next genus, and containing 
a small incisor tooth on each side; no inter-parietal bone ; 
upper canine not vertically longer than the grinders ; the upper 
pre-molar and molar series of teeth arranged to converge 
but slightly anteriorly, forming, as seen from the front, a some- 
what convex line, differing in this from some species of Lepzdo- 
demur, in which these teeth are arranged in a nearly straight 
line. 
Top of head grey, the base of the hairs Mouse-grey, with 
black or white tips ; a triangular patch on the middle of the 
head, darker ; band on the sides and middle of the nose dark 
brown, widening out on the forehead and over the eyes; a 
dark ring round the eyes, merging into the dark brown colour 
of the nose; front border of the ears, a patch behind the latter, 
the lips, chin, sides of cheek, and chest a creamy- or yellowish- 
white ; throat grey; upper side of the body, outside of the 
limbs, and dorsal end of the tail, rufous-grey ; back portion of 
