SOUTH ISLAND, a small island in the Eastern Seas, near the south-west coast of the island of Bouillon. Long. 122. 50. E. Lat. 5. 42. S. This is also the name of a small island in the Indian Sea, near the eastern coast of Madagascar. Long. 50. 20. E. Lat. 17. S. There is another small island of this name near the south coast of the island of Celebes. Long. 120. 51. E. Lat. 5. 45. S.