The taxonomic association of Mus faberi Jentink with Rattus xanthurus (Gray), a species known only from Celebes (Rodentia: Muridae). The identities and allocations of Taeromys paraxanthus and T. tatei, two taxa based on composite holotypes (Rodentia, Muridae). The taxonomic status of Rattus tondanus Sody and notes on the holotypes of R. beccarii (Jentink) and R. Thysanurus Sody (Rodentia: Muridae).