xii CONTENTS 



CHAP. PAGE 



XIII. The Structure of the Barrier 151 



XIV. The Island Beaches 168 



(A) The Seawaed Beaches 1 68 



(B) The Beaches of the Lagoon Shore 172 



XV. The Structure of the Islands 176 



XVI. The Lagoon 185 



XVII, The Climate and Prevalent Winds 201 



XVIII. The 'Jheories of Atoil and Reef Formation put 

 Forward until the Publicaiion of Darwin's 

 Theory of Subsidence. 212 



XIX. The Theories of Atoll and Reef Formation put 

 Forward since the Publication of Darwin's 

 Theory — The Theory of "Solution" 221 



XX. The Theories of Atoll and Reef Formation put 



Forward since 1880 232 



XXI. The Method of Development of the Reef Bank 



and the Reef 237 



XXII. Development of the Atoll 253 



XXIII. The After-Hjstohy of the Atoll 262 



XXIV. The Development of other Coral Structures, and 



the Indications of Alteration of Land-Level 278 



PART IV. THE FLORA AND FAUNA OF 

 THE GROUP 



XXV. The Methods of Natural Colonisation 286 



XXVI. Ship-borne and Wind-borne Colonists 302 



XXVII. The Littoral and Marine Fauna 314 



