INDEX. 



Acalephs, characters of, 375. 

 Acontia, 34. 

 Aiou, 307. 

 Actinacea, 61. 

 Actinaria, 61. 

 Actinoid Polyps, 21. 

 Adamsia palliata, 35. 

 Admiralty Islands, 309. 

 Africa, reefs of eastern, 318. 

 Agassiz, L., on Astrangia, 68. 



" depth of reef corals, 116. 



" coral borers, 121. 



" on Florida reefs, 207. 



" on Bahamas and Salt Key 



Bank, 213. 

 Agassiz, A., on Arachnactis, 28. 



Seaside Studies, 68, 105. 

 Ahii, 171, 177, 182, 200. 

 Aitutaki, 337. 

 Aiva, 261. 

 Alcyonacea, 82. 



Alcyonium, derivation of term, 80. 

 Alcyonoid, polyps, 80. 

 Almirante, 314. 

 Alveopora, 75. 



" spongiosa, 77. 



" Verilliana, 77. 

 Andrews, on Molokai and Maui, 341. 

 Anguilla Key, 214. 

 Antipathacea, 62. 

 Antipathes arborea, 63. 

 Anthea cereus, 37, 57. 

 " flagellifera, 37. 

 Anthelia lineata, 83. 

 Apaiang, elevation of, 167, 343 

 Apamama, 164, 344. ♦ 

 Apatite on Mauke, 297. 



Apia on Upolu, harbor of, 239. 



Aratica, 177, 180, 203. 



Arru Group, 310. 



Ascension Island, 355. 



Asia, temperature of ocean along the east 



coast of, 300. 

 Asie, 307. 



Astrsea pallida, 57, 64. 

 Astrseacea, 64. 



" distribution of, 109. 



Astrangia Danae, 68. 

 Atiu, 194, 305, 336, 361. 

 Atlantic Ocean, subsidence in, 368, 369. 

 Atolls, structure of, 162, 174. 

 Atoll reefs, origin of, 248. 



" " origin of lagoons of, 254, 264. 



" " completed, 271. 

 Aurora Island, 193. 



Australian reefs, 135, 142, 148, 309, 310 

 329. 



Bahamas, 213. 



Bahama region, subsidence in, 368. 



Bailey, J. W., on absence of foraminifers 



from chalk of Oahu, 359. 

 Baker's Island, 291, 340. 

 Balbi, remarks on encircling reefs, 265. 

 Barrier reefs, origin of, 254, 257. 

 Beach formations, 184. 

 Beechey, on Henderson Island, 194. 

 " soundings by, 172. 

 " remarks on Gambier Islands, 

 265. 

 on Elizabeth Island, 334, 335. 

 " on Ducie's and Osnaburgh Isl- 

 ands, 335. 



