INDEX. 



The names in italics are all names of places, and refer exclusively to the 

 Appendix : in well-defined archipelagoes, or groups of islands, the name 

 of each separate island is not given. 



PAGE 



Abrolhos, Brazil, coated by 



corals . . . .81 

 Abrolhos {Australia) . .2.2.1 

 Absence of coral-reefs from 



certain coasts . . .84 

 Acaba, gulf of . . .251 

 Admiralty group . . .211 

 Africa, east coast, fringing- 



reef of . . • 79 



Madreporitic rock of .171 



Africa, east coast . . . 240 

 Age of individual corals 95, 109 



Aiou 217 



Aitutaki . . . .192 

 Aldabra .... 237 

 Alert reef .... 209 

 Alexander, Grand Duke,island 195 

 Allan, Dr., on Holuthurise 



feeding on corals . . 30 

 — — on quick growth of corals 



at Madagascar . 103, 104 

 - on reefs affected by cur- 

 rents . 

 Alloufatou . 

 Alphonse . . 

 Amargura . 

 Amboina 



America, west coast 

 Amirantes . 

 Anachorites . 

 Anambas 



Anamouka, description of 

 Anamouka . 

 Andaman is Ids. . • 

 Antilles , . 



i*7, 



Appoo reef 



XI 

 202 

 236 

 20I 

 2l8 

 188 

 236 

 211 

 226 

 167 

 . 201 

 . 225 

 26l, 262 

 . 228 



179 



179 



182 

 217 

 2l6 

 112 



236 

 236 



204 



PAGE 



Arabia Felix . . .. 244 



Areas, great extent of, inter- 

 spersed with low islands 118, 119 



of subsidence and of 



elevation . .178, 



■ of subsidence appear to 



be elongated 



of subsidence alternat- 

 ing with areas of ele- 

 vations . . 181, 



Arru group .... 



Arzobispo .... 



Ascidia, depth at which found 



Assomption .... 



Astova ..... 



Atlantic islands . 



Atolls, breaches in their reefs 



47, 136, 137 



dimensions of 36, 37, 38 



dimensions of groups of 



118, 119 



— — not based on craters or 



on banks of sediment, 



or of rock . 115, 116, 



120, 121, 122, 181, 182 



of irregular forms 36, ^7, 



_ 38, 141, 142 



steepness of their flanks 38, 39 



width of their reef and 



islets . . 37, 38 



their lowness . 117,118 



lagoons . 41, 42, 43 



general range . 157, 158 



with part of their reef 



submerged, and theory 



of . 44,45, 136, 137 



