SULA ISLANDS (Sulla, Xuila; Dutch Soela), a chain of islands forming a prolongation of the eastern peninsula of Celebes and the Banggai Islands, Dutch East Indies. The three main islands are long and narrow (Taliabu, 68 m. long, Mangoli or Mangala, 63 m. and Besi, 30 m.). The two first lie in line, separated by the narrow Chapalulu Strait; Besi extends at right angles to the south coast of Mangoli. The natives of Taliabu are allied to those of the Banggai Islands and the eastern peninsula of Celebes; but immigrant Malays are the principal inhabitants. Economically, Besi is the most important island. A Dutch commissioner resides at Sanana, at its northern extremity. It is fertile, and produces wax and honey, and coal has been found.