THE MALDIVE AND LACCADIVE GKOUPS, WITH NOTES ON OTHER 

 CORAL FORMATIONS IN THE INDIAN OCEAN (continued). 



By J. Stanley Gardiner, M.A., Felloiv of Gonville and Cams College, 

 and late Balfour Student of the University of Cambridge. 



(With Plates XVI. and XVII. and Text-Figs. 74 and 75.) 



CONTENTS. 



Appendix A. Special Observations and Wobk relating to the Formation and Growth 



OP Coral Reefs. 



Section I. The Seaward Slopes op Atoll Keeps ........ 314 



Topography — Reef-edge (Fissures, Organisms, etc.) — 10 to 15 Fathoms (Corals and 

 Lithothamnion) — 30 Fathoms (Form of Growth and Genera of Corals, Poly- 

 trerna) — Summary. 



Section II. The Formation of Lagoons .......... 317 



Addu Lagoon (off Huludu, Lagoon Flat, Coral Growth, Character of Bottom, 

 Soundings, Shoaling, Physical Conditions, Causes of filling in. Conclusions) — 

 General Growth in Size — Circulation of the Water — Solution — Analyses of 

 Deposits — Conclusions. 



Section III. The Bathymetrical Limits op Coral Reef Builders .... 323 



Dredging — Table of Coral Genera and Depths — Corals between 20 and 40 Fathoms 

 — Heliopora and Mille.pora — Polytrema — Algae — Diaseris — Conclusions. 



Section IV. The Rate op Growth op Corals and Reeps ...... 327 



The Problem — Literature — Artificial Canals in the Maldives — Coral Growth and 

 Physical Conditions of Hulule Canal — Table of Growths of Corals — Rate of 

 Growth of Reefs — Conclusions. 



40—2 



