MAMMALIA — QUADRUMANA. 
21 
unknown, e. Like d., but with white bands above the eyes ; 11. 0. mona : 
12. C. roloway ; which Is. Geotfroy separates from the Diana, because 
the back is deep dark brown, almost black (in the Diana, brown) ; 
farther, the belly is white in the living animal, bordering on orange (in 
the Diana, blackish) ; and the inner side of the thighs is of the same 
colour (in the Diana, rust-coloured) : thus, Bennett’s 0. diana should 
be placed with the Roloway : 13. C. diana, founded on the species of 
Linnasus and Schreber: 14. 0. leucampyx ; in order to distinguish 
this species from both the preceding, it is to be remarked, that the white 
hue upon the under side, in the C. roloway, comprises throat, breast, 
and beUy ; in the C. diana, throat and breast only ; and in the 0. leu- 
campy x, merely the chin ; the latter species also has no beard, and the 
outlines of the forehead are much larger. — B. Snout somewhat longer, 
body less slender, disposition petulant and irritable, fur greenish-grey 
or green : 15. C. Lalandii, Is. Geoff. (C. pusillus, Desmoul), is distin- 
guished by Is. Geoffrey from the C. pygerythrus, because in it the fur 
is not properly green, not even on the back or head, but only grey, 
slightly or scarcely at all sprinkled with a green or olive hue : from the 
Cape, especially from Cafferland ; common : 16. C. pygerythrus ; like 
the preceding, but head, back, shoulders, sides, and upper side of the 
tail yeUowish-green, sprinkled with black ; differing from the following 
species (equally with the preceding) by the colour of the hinder parts, 
the hands, and the black chin; habitat unknown, though Fr. Cuvier, 
from confounding it with the former one, gives the Cape : 17. 0. cyno- 
suros, to which the author joins the C. tephrops: 18. C. griseo-viridis : 
19. C. Sahceus : 20. O. tantalus ; yet very uncertain : 21. C. rufo-viri- 
dis ; also first characterized by Is. Geofiroy; head superiorly olive- 
green ; back greenish-red ; sides pure red ; shoulders and thighs green- 
ish-grey ; the rest of the upper parts grey ; under parts white : habitat 
unknown, g. Fur red. 22. C. ruber, from Senegal : 23. O. pyrrhono- 
tus, from Nubia. Is. GeofiTroy separates both, as specifically distinct, 
while I, in my monograph (with which the author is not acquainted), 
have given them as two varieties of the same species. I believe now, 
on account of their different habitats, it would be better to hold them 
as separate. It is not the case, however, that in the C, pyrrhonotus, as 
Geoffrey says, the outside of the under part of the limbs is red, and grey 
in the O. ruber ; the reverse is exactly the case {vide my Monograph). 
On the O. albigularis, the author has no information. 
Some farther information on the Cercopithecus erythrotis and Martini 
has been given by Mr. Waterhouse in Ann. of Nat. Hist. ix. p. 147. 
J. E. Gray describes (Ann. x. p. 256), a Cercopithecus Burnettii ; — 
greyish-black ; head, neck, and upper part of the back yellow dotted ; 
throat, cheek, abdomen, and inside of legs greyish-white; hair of the 
cheeks and forehead yellow, with a small black tuft over each eye ; hairs 
65 E 
