ZEixiiPXj^isr^Tioiisr of plate v. 



A, Branching Coral, drawn by Florence A. Hatch, Glines School, Somerville, Mass. B, Barrier 

 Beef; C, Fringing Reef, by Eliot H. Robinson, Williams School, Auburndale. Mass. S, Sea level; 

 R, reef; L, land ; I, lagoon ; o. ocean bottom. 



