Mus callewaerti (Thomas, 1925) . Ann. Mag. Nat. Hist., ser. 9, 15:668.

TYPE LOCALITY: S Zaire, Lualaba, Luluabourg, 610 m .

DISTRIBUTION: Recorded only from N and C Angola, S and W Zaire; limits unknown.

COMMENTS: Subgenus Nannomys . Thomas described this species as a member of the genus Hylenomys, which is now united with Mus (Hill and Carter, 1941; Misonne, 1965). It is the largest-bodied of any of the African Mus (Petter and Matthey, 1975), has ivory incisors and very large auditory bullae, and in external features resembles M. triton, which misled Hatt (1940«) into treating callewaerti as a subspecies of triton . Misonne (1965) summarized distributional and other information.