Hylomyscus aeta (Thomas, 1911) . Ann. Mag. Nat. Hist., ser. 8, 7:591.

TYPE LOCALITY: Cameroon, Bitye, Ja River .

DISTRIBUTION: The central forest block from Equatorial Guinea (Bioko = Fernando Poo) to Cameroon, Gabon, Central African Republic, Republic of the Congo, Zaire, W Uganda, and NW Burundi; limits unknown.

SYNONYMS: grandis, laticeps, shoutedeni, weileri.

COMMENTS: H. aeta is easily distinguished from all other species of Hylomyscus by its distinct supraorbital shelves. Hatt (1940a) tenatively included aeta, shoutedeni, and weileri in H. carillus but our study of samples and holotypes does not support his arrangement. Variation in body size exists among the samples but its significance has not been assessed by careful study. The range in Burundi is based on specimens in the Field Museum of Natural History. Swynnerton and Hayman (1951:316) listed a record from the Uluguru Mtns in EC Tanzania but we have not been able to verify it. Chromosomal data were reported by Robbins et al. (1980). Eisentraut's (1969b) grandis from Mt. Oku is a separate species (Hutterer, 1992).