cercopithecus lelandii

from The Collaborative International Dictionary of English v.0.48

Vervet \Ver"vet\, n. (Zool.)
   A South African monkey ({Cercopithecus pygerythrus} syn.
   {Cercopithecus Lelandii}). The upper parts are grayish green,
   finely specked with black. The cheeks and belly are reddish
   white.
   [1913 Webster]