will, make their flesh his own. Dog or wolf, bear or badger

CHAPTER II.--BARRIER REEFS. Closely resemble in general form and structure atoll-reefs.--Width and depth of the lagoon-channels.--Breaches through the reef in front of valleys, and generally on the leeward side.--Checks to the filling up of the lagoon-channels.--Size and constitution of the encircled islands.-- Number of islands within the same reef.--Barrier-reefs of New Caledonia and Australia.--Position of the reef relative to the slope of the adjoining land.--Probable great thickness of barrier-reefs.

CHAPTER III.--FRINGING OR SHORE-REEFS. Reefs of Mauritius.--Shallow channel within the reef.--Its slow filling up.--Currents of water formed within it.--Upraised reefs.--Narrow fringing-reefs in deep seas.--Reefs on the coast of E. Africa and of Brazil.--Fringing-reefs in very shallow seas, round banks of sediment and on worn-down islands.--Fringing-reefs affected by currents of the sea. --Coral coating the bottom of the sea, but not forming reefs.

CHAPTER IV.--ON THE DISTRIBUTION AND GROWTH OF CORAL-REEFS.

SECTION 4.I.--ON THE DISTRIBUTION OF CORAL-REEFS, AND ON THE CONDITIONS FAVOURABLE TO THEIR INCREASE.

SECTION 4.II.--ON THE RATE OF GROWTH OF CORAL-REEFS.

SECTION 4.III.--ON THE DEPTHS AT WHICH REEF-BUILDING POLYPIFERS CAN LIVE.

CHAPTER V.--THEORY OF THE FORMATION OF THE DIFFERENT CLASSES OF CORAL-REEFS. The atolls of the larger archipelagoes are not formed on submerged craters, or on banks of sediment.--Immense areas interspersed with atolls.--Recent changes in their state.--The origin of barrier-reefs and of atolls.--Their relative forms.--The step-formed ledges and walls round the shores of some lagoons.--The ring-formed reefs of the Maldiva atolls.--The submerged condition of parts or of the whole of some annular reefs.--The disseverment of large atolls.--The union of atolls by linear reefs.--The Great Chagos Bank.--Objections, from the area and amount of subsidence required by the theory, considered.--The probable composition of the lower parts of atolls.

CHAPTER VI.--ON THE DISTRIBUTION OF CORAL-REEFS WITH REFERENCE TO THE THEORY OF THEIR FORMATION. 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 subsidence.--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.