VI 



CUTS IN TEXT. 



Fig. Page. 



1. Structure of ground in bore-hole of June, 1896 3 



2. Section showing site of Second Boring 4 



3. Diagrams of profiles of the atoll 9 



4. Diagram-sections through rims of Keeling and Funafuti Atolls 10 



5. Lagoon clitf of coral rock, Funafuti 14 



6. Cliff of coral rock projecting from outer ridge 14 



7. Mode of origin of base-rock 15 



8. Pinnacles of coral rock, Pava Islet 15 



9-11. Hypothetical sections through summit of atoll 17 



12. Diagram-profiles across islets 19 



13. //t7J(>/JW(? c«'rM/(,'(/., as seen on 'floor of Mangrove Swamp 21 



14. Diagram of Heliopora and associated roriks 21 



15. Diagram of coral summits at low-water level 22 



16. Diagram-section through lagooa-cliff, Amatuku 24 



17. The fertilising wheel 50 



18. View of inner part of Hurricane Bank 77 



19. Six weeks' growth of Haliineda 146 



20. Boring apparatus on H.M.S. "Porpoise" 161 



21. Transverse section of Madrepara conteda 326 



22. Vertical section of same coral 327 



23. Diagram showing proportion of calcium and magnesium carbonate at different depths 



in Main Boring 364-365 



24-49. Microscope-sections showing mineralogical changes observed in the cores . . 395-414 



50-69. Diagrammatic illustrations of some of the conditions of preservation and types of 



mineralisation exhibited by the corals 416-419 



