The Committee of the International Colonial Exhibition at Amsterdam has been kind enough to send to me a collection of Mammals made by Mr. F. von Feber during his residence in N. Celebes and W. Sumatra. The request was that I should subject the collection to a systematic review I feel sure that this review contains many facts interesting to zoologists, as it embraces certain very rare and partly unknown species and at the same time gives a very good idea of the peculiar Fauna of Celebes. The Mammals have been collected in the neighborhood of Loeboe Basong, Priaman, West-Sumatra, and in the vicinity of Amoerang, North-West-Celebes.