According to Mr. von Rosenberg, the untired explorer of the Moluccan region, the Sanghi-islands are inhabited by the following Mammalia, viz: bats, mice, one species of Sus and none but one species of Sciurus. In the Leyden Museum there are now twelve specimens of the latter species, which has hitherto remained undescribed: they were collected by von Rosenberg (1864) and Hoedt (1865 and 1866).