INDEX. 



143 



Pebbles cemented by lime, 16. 

 Plants of coral islands, 45. 



Quoy and Gaymard, on limits of growing 

 corals, in depth, 63. 



Radack and Ralick Islands, 134. 

 Raraka, island of, 20, 23. 

 Revillagigedo Islands, 100. 

 Rivers, effect of, on coral reefs, 80. 

 Rocks of coral material, 10, 12, 15, 26, 32, 

 35, 110, 111. 



used for building in Oahu, 12. 

 Rose Island, 45. 

 Rota, island of, 134. 

 Rotuma, island of, 132. 

 Rurutu, island of, 101, 129. 



Samoan Islands, on reefs of, 101. 



evidence of subsidence at, 123. 

 no evidences of elevation among, 

 131. 

 Sea, action of, on islands before the exist 

 ence of reefs, 137. 



action of, on coral islands, 74. 

 Sea-bottom disturbed by waves at great 



depths, 71. 

 Sea-shores, triturating action of sands of, 



73. 

 Sea-shore platform of coral islands, 76. 



of New Zealand, 75. 

 Sea-water, gypsum deposited from, 57,139. 

 Sediment, various characters of, in chan- 

 nels among reefs, 14. 

 Siau, action of waves on sea-bottom, 71. 

 Silliman, B., Jr., analysis of coral chalk, 

 113. 



analysis of coral rock from Matea, 115. 

 analyses of corals, 113. 

 analysis of coral sand from the straits 

 of Balabac, 115. 

 Society Islands, reefs and harbors of Ta- 

 hiti, 14, 100. 



evidence of change of level at, 

 128. 

 Sooloo Islands, reefs of, 105. 

 Soundings near coral islands, 24. 

 Stalactites, calcareous, of coral islands, 35. 

 Stevenson, T., force of waves, in trans- 

 porting rocks, 71. 



Stutchbury, S., depth of growing corals, 63. 

 observations on the rate of growth of 

 Zoophytes, 67. 



height of Rurutti, 129. 

 Subsidence, coral reefs and islands, evi-= 

 dence of, 89, 94, 119, 126. 

 at island of Banabe, 125. 

 in Pacific, axis of area of, 123. 

 extent of, 124. 



loss of land in consequence of, 93, 

 action of, ih causing the forms of reefs 

 and coral islands, 89. 

 Sydney Island, 131. 



Tahiti, coral reefs of, 13, 19, 81, 122, 128. 

 Taiara or King's Island, 22, 39. 

 Teputeouea, 21, 43. 



Tarawan or Kingsmill Islands, descriptions 

 of, 21, 32. 133. 

 water in, 43. 

 Temperature limiting coral-reef seas, 61, 



97, 139. 

 Tonga Islands, 101, 130. 



Tongatabu reefs, 12, 130. 

 coral mud of, 32. 

 Tubuai, 1 29. 



Upolu reefs, thickness of, 19. 

 harbor of Apia, 79. 

 harbor of Falifa, 82. 



Vanikoro Group, reefs of, 102. 

 Vincennes Island, 30, 41. 



Wallis's Island, 92. 



Washington Island, 38, 129. 



Wateoo, 129. 



Water, fresh, on coral islands, 43. 



Waterland, 29. 



Waves, action of, on sea-bottom, 71. 



action of, on coasts, 74. 

 Whytuhu, 39. 

 Wolchonsky, island of, 23. 



Zoophytes, growth and structure of, 47. 

 secretion of coral by, 47. 

 causes influencing growth, 59. 

 depths of growing, 62. 

 rate of growth, 66. 

 distribution of, 61, 97. 



