GEOLOGICAL COMPOSITION of coral-formations. Gilbert archipelago. Gilolo. Glorioso. GLOUCESTER Island. Glover reef. Gomez. Gouap. Goulou. Grampus. Gran Cocal. GREAT CHAGOS BANK, description and theory of. GREY, Captain, on sandbars. GROUPING of the different classes of reefs. Guedes. HALL, Captain B., on Loo Choo. HARVEY islands, recently elevated. HEIGHT of encircled islands. Hermites. Hervey or Cook islands. Hogoleu. HOLOTHURIAE (Holuthuriæ) feeding on coral. HOUDEN island, height of. Honduras, reef off. Horn. Houtman Abrolhos. HUAHEINE; alleged proofs of its recent elevation. Huaheine. Humphrey. Hunter. HURRICANES, effects of, on coral-islands. Immaum. Independence. INDIA, west coast, recently elevated. India. IRREGULAR REEFS in shallow seas. ISLETS of coral-rock, their formation. Their destruction in the Maldiva atolls. Jamaica. Jarvis. JAVA, recently elevated. Java. Johnston island. Juan de Nova. Juan de Nova (Madagascar). Kalatoa. KAMTSCHATKA, proofs of its recent elevation. Karkalang. KEELING atoll, section of reef. Keeling, south atoll. North atoll. Keffing. Kemin. Kennedy. Keppel. Kumi. Laccadive group. LADRONES, or Marianas, recently elevated. Ladrones archipelago. LAGOON of Keeling atoll. LAGOONS bordered by inclined ledges and walls, and theory of their formation. Of small atolls filled up with sediment. LAGOON-CHANNELS within barrier-reefs. LAGOON-REEFS, all submerged in some atolls, and rising to the surface in others. Lancaster reef. Latte. Lauglan islands. LEDGES round certain lagoons. Lette. Lighthouse reef. LLOYD, Mr., on corals refixing themselves. LOO CHOO, recently elevated. Loo Choo. Louisiade. LOW ARCHIPELAGO, alleged proofs of its recent elevation. Low archipelago. LOWNESS of coral-islands. Loyalty group. Lucepara. LUTKE, Admiral, on fissures across coral-islands. LUZON, recently elevated. Luzon. LYELL, Mr., on channels into the lagoons of atolls. On the lowness of their leeward sides. On the antiquity of certain corals. On the apparent continuity of distinct coral-islands. On the recently elevated beds of the Red Sea. On the outline of the areas of subsidence. Macassar strait. Macclesfield bank. MADAGASCAR, quick growth of corals at. Madreporitic rock of. Madagascar. Madjiko-sima. Madura (Java). Madura (India). MAHLOS MAHDOO, theory of formation. MALACCA, recently elevated. Malacca. MALCOLMSON, Dr., on recent elevation of W. coast of India. On recent elevation of Camaran island. Malden. MALDIVA atolls, and theory of their formation. Steepness of their flanks. Growth of coral at. Maldiva archipelago. MANGAIA island. Recently elevated. Mangaia. Mangs. MARIANAS, recently elevated. Mariana archipelago. Mariere. Marquesas archipelago. Marshall archipelago. Marshall island. Martinique. Martires. MARY’S ST., in Madagascar, harbour made in reefs. Mary island. Matia, or Aurora. MATILDA atoll.