What is "cercopithecus griseo-viridis"

Guenon \Guenon"\, n. [F.] (Zo["o]l.) Any of several long-tailed arboreal African monkeys, of the genera Cercopithecus and Erythrocebus (formerly classified as Cercocebus), such as as the green monkey ( Cercopithecus callitrichus) and grivet ( Cercopithecus griseo-viridis).

Grivet \Griv"et\ (gr[i^]v"[e^]t), n. [Cf. F. grivet.] (Zo["o]l.) A monkey of the upper Nile and Abyssinia ( Cercopithecus griseo-viridis), having the upper parts dull green, the lower parts white, the hands, ears, and face black. It was known to the ancient Egyptians. Called also tota.