It is probable that the Liberian chimpanzee may offer one or more distinct varieties; there is an interesting local development of the Diana monkey, sometimes called the bay-thighed monkey (Cercopithecus diana ignita) on account of its brilliant orange-red thighs.
GREEN MONKEY, a west African representative of the typical group of the guenon monkeys technically known as Cercopithecus callitrichus, taking its name from the olive-greenish hue of the fur of the back, which forms a marked contrast to the white whiskers and belly.
GRIVET, a monkey, Cercopithecus sabaeus, of the guenon group, nearly allied to the green monkey.
GUENON (from the French, = one who grimaces, hence an ape), the name applied by naturalists to the monkeys of the African genus Cercopithecus, the Ethiopian representative of the Asiatic macaques, from which they differ by the absence of a posterior heel to the last molar in the lower jaw.
Scientifically it is known as Cercopithecus (Erythrocebus) pates, and typifies a section of its genus of which the other representative is the East African nisnas (C. [E.] pyrrhonotus).