10 CONTENTS. 
Ill. Formations in the Sea outside of Barrier Reefs . 
IV. Inner Reefs. 
V. Channels among Reefs . 
VI. Beach Sand-Rock 
VIL. Drift Sand-Rock . 
VIII. Thickness of Reefs ; 
IX. A Good Word for Coral Reefs 
II. Cora IsLaAnps 
I. Forms and General Features . 
II. Soundings about Coral Islands 
III. Structure of Coral Islands . 
IV. Notices of some Coral Islands 
Maldive Archipelago 
Great Chagos Bank . j 
Metia, and other elevated stands 
Birnie’s, Enderbury’s 
Hall’s, Swain’s 
Oatafu, Fakaafo . : 
Washington, Otuhu, Mocseee Teku, aes 
Taiara, Ahii 
Raraka . 
Kawehe . Pea Se, we 
Manhii, Aratica, Nairsa or Dean’s . 
Florida Reefs and Keys 
Between the Florida Reefs and Gules Salt ae Hane 
Bahama Islands 
Bermuda or Somers’ Islands . 
CHAPTER III. 
PAGE 
139 
144 
148 
152 
154 
156 
159 
161 
161 
Wel 
174 
185 
186 
192 
193 
196 
197 
198 
199 
200 
201 
202 
203 
204 
210 
214 
218 
FORMATION OF CORAL REEFS AND ISLANDS, AND CAUSES OF THEIR 
FEATURES. 
I. ForMATION OF REEFs . 
I. Origin of Coral Sands and the Reef-Rock 
II. Origin of the Shore Platform . 
Ill. Effects of Winds and Gales 
Il. Causes Mopiry1nc THE Forms AND GROWTH OF REEFS 
I. Barrier and Fringing Reefs 
II. Atoll Reefs . : ; 
Ill. Rate or GrowtTH oF Ree: 
227 
224 
