_Theropithecus_, Is. Geoffr., Arch. Mus., ii., p. 576 (1841).
This genus has been established for the reception of two species which
differ from the true Baboons (_Cynocephalus_) in having the nostrils placed
on the side of the snout, instead of being terminal and opening, Dog-like,
on the blunt face of the truncated nose.