cemented together by indu- /12 rated lime said originating from corals and other marine animals and algae. The lower exposed portion of the cliffs consists of more finely grained material and masses of coral seem to be absent, or at they are rare in it. This finer bed any rate. This finer bed is at sea level and is greenish surface black in color from its coating of plant growth life whose growth fostered by is due to constant wetting by tide and waves. The whole surface of the limestone has been deep- ly corroded wherever the sea can reach it by wave or spray. The result is an intricate network of cirque-like hollows