12 CONTENTS. 



CHAPTER VI. 



ON THE DISTRIBUTION OF CORAL-REEFS WITH REFER- 

 ENCE TO THE THEORY OF THEIR FORMATION. 



PAGE 



Description of the coloured map. — Proximity of atolls and 

 barrier-reefs. — Relation in form and position of atolls 

 with ordinary islands. — Direct evidence of subsidence 

 difficult to be detected. — Proofs of recent elevation 

 where fringing-reefs occur. — Oscillations of level. — 

 Absence of active volcanoes in the areas of sub- 

 sidence. — Immensity of the areas which have been 

 elevated and have subsided. — Their relation to the 

 present distribution of the land. — Areas of subsidence 

 elongated, their intersection and alternation with 

 those of elevation. — Amount and slow rate of the 

 subsidence. — Recapitulation . . 151 to 185 



APPENDIX. 



Containing a detailed description of the reefs and islands 



in Plate V. . . . . . 187 to 264 



General Index . . . . . 265 to 273 



