SCARUS feeding on corals. Schouten. Scilly. SCORIAE floated to coral-islands. Scott’s reef. SECTIONS of islands encircled by barrier-reefs. Of Bolabola. SEDIMENT in Keeling lagoon. In other atolls. Injurious to corals. Transported from coral-islands far seaward. Seniavine. Serangani. Seychelles. SHIP-BOTTOM quickly coated with coral. SMYTH island. SOCIETY archipelago, stationary condition of. Alleged proofs of recent elevation. Society archipelago. Socotra. Solor. SOOLOO islands, recently elevated. Sooloo islands. Souvaroff. Spanish. SPONGE, depths at which found. Starbuck. (Slarbuck.) STONES transported in roots of trees. STORMS, effects of, on coral-islands. STUTCHBURY, Mr., on the growth of an Agaricia. On upraised corals in Society archipelago. SUBSIDENCE of Keeling atoll. Extreme slowness of. Areas of, apparently elongated. Areas of immense. Great amount of. Suez, gulf of. Sulphur islands. SUMATRA, recently elevated. Sumatra. Sumbawa. SURF favourable to the growth of massive corals. Swallow shoal. Sydney island. TAHITI, alleged proofs of its recent elevation. Tahiti. TEMPERATURE of the sea at the Galapagos archipelago. Tenasserim. Tenimber island. Teturoa. THEORIES on coral-formations. THEORY OF subsidence, and objections to. THICKNESS, vertical, of barrier-reefs. Thomas, St. Tikopia. TIMOR, recently elevated. Timor. Timor-laut. Tokan-Bessees. Tongatabou. Tonquin. Toubai. Toufoa. (Toofoa.) Toupoua. TRADITIONS OF CHANGE in coral-islands. TRIDACNAE embedded in coral-rock. Left exposed in the Low archipelago. TUBULARIA, quick growth of. Tumbelan. Turneffe reef. Turtle. Ualan. VANIKORO, section of. Its state and changes in its reefs. Vanikoro. Vine reef. Virgin Gorda. Viti archipelago. VOLCANIC islands, with living corals on their shores. Matter, probably not associated with thick masses of coral-rock. VOLCANOES, authorities for their position on the map. Their presence determined by the movements in progress. Absent or extinct in the areas of subsidence. Waigiou. Wallis island. Washington. Well’s reef. WELLSTEAD, Lieutenant, account of a ship coated with corals. WEST INDIES, banks of sediment fringed by reefs. Recently elevated. West Indies. WHITSUNDAY island, view of. Changes in its state. WILLIAMS, Rev. J., on traditions of the natives regarding coral-islands. On antiquity of certain corals. Wolchonsky. Wostock. Xulla islands. York island. Yucutan, coast of. ZONES of different kinds of corals outside the same reefs.