(The Bernard Price Institute for Palaeontological Research, 1957-04)
This is the first of a series to be devoted to the rodent fossils of South African caves.
It is mainly concerned with a discussion of the Cricetid genus Mystromys, which forms the
dominant element of the rodent fauna. The two sub-species of M. hausleitneri described by
Broom are considered to be indistinguishable from each other; the species itself is distinguished
by the dimensions of the teeth. The dentition of a new species, Mystromys darti, is fully
described and the relations with Petromyscus are discussed.