Cercopithecus griseo-viridis

from The Collaborative International Dictionary of English v.0.48

Grivet \Griv"et\ (gr[i^]v"[e^]t), n. [Cf. F. grivet.] (Zool.)
   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}.
   [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Guenon \Guenon"\, n. [F.] (Zool.)
   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}).
   [1913 Webster +PJC]

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