10 CONTENTS. 



CHAPTER II 



STRUCTURE OP CORAL REEFS AND ISLANDS. 



PAGE. 



I. Coral Reefs. -------- 128 



I. General Features. -------- 128 



II. Outer Reefs. - - 136 



III.. Formations in the Sea outside of Barrier Reefs. ... 139 



IV. Inner Reefs. - . - - - - 144 



V. Channels among Reefs. - ----- 148 



VI. Beach Sand-Rock. - - 152 



Vn. Drift Sand-Rock. 154 



VIII. Thickness of Reefs. - 156 



IX. A Good Word for Coral Reefs. - - - - - - 159 



II. Coral Islands. -------- 161 



I. Forms and General Features. ------ 161 



II. Soundings about Coral Islands. - 171 



III. Structure of Coral Islands. - - - ' « - - - 174 



IV. Notices of some Coral Islands. ----- 185 



Maldive Archipelago. ------- 186 



Great Chagos Bank. ------ 192 



Metia, etc. --._--.. 193 



Jarvis's Island. ------- 195 



Birnie's and Swain's Islands. ----- 196 



Otuhu, Margaret, Tehu, Washington Island, Enderbury's Island. 197 



Honden, or Henuake. ------- 198 



Taiara, Sydney's, Duke of York's. - - - - 199 



Fakaafo, Ahii. 200 



Raraka. -------- 201 



Kawehe. 202 



Manhii, Aratica, Nairsa or Dean's. .... 203 



Florida Reefs and Keys. ------ 204 



Soundings between Florida Reefs and Cuba. « - - 211 



Bahamas. --..--..--. 213 



Salt Key Bank. 214 



Bermuda or Somers' Islands. - 218 



