396 



INDEX. 



New Zealand Old Hat, 231. 

 Nonouti, 164, 169, 340. 

 Norfolk Island, 308. 

 Nukunono, 338. 

 Nullipores, 107, 174. 



Oahu, 306, 324. 

 " caverns in elevated coral reef of, 

 361. 

 chalk of, 359. 

 Oatafu, 338. 



Oceanic currents carry away little detri- 

 tus from islands, 143. 

 Oceanic subsidence, proofs of, 364. 

 Ocean Island, 325, 342. 

 Oculinacea, 66, 109. 

 Oculina diffusa, growth of, 125, 252. 



" varicosa, 69. 

 Okatutaia, 336. 

 Old Hat, 231. 

 Oolite, 153, 156. 



Oolitic rocks of Florida Keys, 204, 216. 

 Orbicella cavernosa, 55. 

 Orbicellidse, 67. 



Orbitolites about Australian reefs, 152. 

 Orbitolites, relations of, 378. 

 Organ-pipe Coral, 84. 

 Otuhu, 197 



Pacific, elevations in, 332. 



" axis of subsidence in 319, 328. 



" subsidence in by broad anticli- 

 nals and synclinals, 328. 



" chain, central length of, 365. 

 Pali, 44. 



Palao, see Pelews. 

 Palmyra Island, 339. 

 Panama, corals of, 111. 

 Pandanus, 276, 281. 

 Paumotus, 111, 169, 280, 304. 



" elevations in, 332. 



Pavonaridse, 93. 

 Peachia hastata, 25. 

 Peacock's Island, 171, 177 182, 200. 

 Pearl and Hermes Eeef, 325. 

 Penrhyn's Island, 339. 

 Pelews, 307, 345. 

 Pennatulacea, 91. 

 Pennatulidae, 93. 

 Peritheca, 60, 97. 

 Persian Gulf, reefs in, 314. 



Pescadores, 170, 331. 

 Phoenix's Island, 291, 340. 

 Phillippine Islands, 311. 

 Phymactis clematis, 22. 



florida, 22. 

 Pitcairn's Island, 304, 325. 

 Plants of Paumotus, list of, 280. 

 Plexaurella, 87. 

 Pliobotbrus, 105. 

 Plumularia falcata, 102. 

 Pocillipora, 70. 

 Pocillipora grandis, 71. 



" elongata, cell of, 71. 



•' plicata, cell of, 71. 



Polyps, classification of, 20, 61, 80. 

 Ponape, 300, 330, 331. 

 Porites family, Poritidae, 75. 

 " size of some, 146. 

 levis, 78, 79. 

 mordax, 53, 78. 

 Port Natal, 315. 



Pourtales, L. P. de, on Thecocyathus, 43. 

 " " on Haplophyllia, 80. 



" " on rate of growth of 



corals, 124. 

 " " bottom of Florida 



reefs, 143. 

 " " depth of reef corals, 



116. 

 " " on Florida region ,211. 



Pouynipete, 306. 



Powell, Lieut., on the Maldives, 186. 

 Protozoans, characters of, 377. 

 Pumice on coral islands, 288. 

 Pylstaarts, 305, 338. 



Qtjelpaert's Island, 311. 

 Quoy and Gaymard, depth of reef corals, 

 115." 



Radiates, characters of, 374. 



Raivavai, 337. 



Rapa, 304. 



Raraka, 169, 171, 201. 



Rarotonga, 337. 



Red Sea corals, 111, 314. 



Reefs, formation of, 222. 



" causes modifying forms of, 238. 



" rate of growth of, 249. 



" of windward side highest, 236. 



