346 



INDEX. 



New Zealand Old Hat, 197 

 Nonouti, 132, 136, 291 

 Norfolk Island, 263 

 Nukunono, 289 

 Nullipores, 82, 141 

 Oahu, 261, 277 



f,, caverns in elevated coral 



reef of, 310 

 ,, chalk of, 308 

 Oatafu, 289 

 Oceanic currents carry away little 



detritus from islands, 113, 114 

 Oceanic subsidence, proofs of, 314 

 Ocean Island, 278, 293 

 Ocean, the Tongue of the, 176 

 Oculinacea, 45, 85 

 Oculina diffusa, growth of, 98, 215 



,, varicosa, 48 

 Okatutaia, 288 

 Old Hat, 197 

 Oolite, 122, 125 

 OoHtic rocks of Florida Keys, 167, 



181 

 Orbicella cavernosa, 35 

 Orbicellid^e, 45 



Orbit olites about Australian reefs, 121 

 Orbitolites, relations of, 325 

 Organ-pipe Coral, 61 

 Otuhu, 160 

 Pacific, elevations in, 284 



,, axis of subsidence in, 273, 

 280 



,, subsidence in by broad 

 anticlinals and syncli- 

 nals, 280 



,, chain, central length of, 



365 

 Pali, 24 



Palao. See Pelews. 

 Palmyra Island, 290 

 Panama, corals of, 86 

 Pandanus, 240 

 Paractis rapiformis, 6 

 Paumotus, 86, 136, 238, 259 

 ,, elevations in, 285 

 Pavonaridse, 70 

 Peachia hastata, 8 



Peacock's Island, 138, 143, 148, 164 

 Pearl and Hermes Reef, 278 

 Penrliyn's Island, 291 

 Pelews, 262, 295 

 Pennatulacea, 68 

 Pennatulidse, 69 

 Peritheca, 39, 73 

 Persian Gulf, reefs in, 268 



Pescadores, 137, 283 

 Phoenix's Island, 248, 291 

 Philippine Islands, 267 

 Phosphate of lime collected on a 

 coral island by Lord Byron of 

 the Blonde, 254 

 Phymactis clematis, 5 



,, florida, 5 

 Pitcairn's Island, 259, 278 

 Plants of Paumotus, list of, 238, 239 

 Plexaurella, 64 

 Pliobothrus, 80 

 Pocillipora, 49 

 Pocillipora grandis, 49 



,, elongata, cell of, 49 



,, plicata, cell of, 49 



Polyps, classification of, 3, 21, 57 

 Ponape, 256, 283 

 Porites family, Poritidae, 52 

 ,, size of some, 116 

 „ levis, 55, 56 

 „ mordax, 33, 55 

 Port Natal, 268 

 Pourtales, L. F. de, on Thecocyathus, 



24 

 ,, ,, on Haplophyllia, 



57 

 ,, ,, on rate of growth 



of corals, 98 

 ,, ,, bottom of Florida 



reefs, 114 

 ., ,, depth of reef 



corals, 90 

 ,, ,, on Florida region, 



172—174 

 Pouynipete, 261 



Powell, Lieut., on the Maldives, 153 

 Protozoans, characters of 377 

 Pumice on coral islands, 246 

 Pylstaarts, 260, 289 

 Quelpaert's Island, 266 

 Quiros Islamp, 242 

 Quoy and Gaymard, depth of reef 



corals, 90 

 Radiates, characters of, 322 

 Raivavai, 288 

 Rapa, 259 



Raraka, 136, 138, 164 

 Rarotonga, 288 



Redearth of the Bahamas, and its 

 uses, 175, 178 ; of the Bermu- 

 das, 186 

 Red Sea corals, 90, 268 

 Reefs, formation of, 189 



„ causes modifying forms of, 203 



