TABLE OF CONTENTS. 



PAGE 



Introduction 239 



Percentage of ingredients according to source 240 



Sizing of sediments 241 



Bottom deposits of the Murray Island reef 243 



Sources of the material 244 



Distributing and sorting agents 245 



Mechanical and chemical analyses 246 



Summary on the Murray Island samples 249 



Composition of two Murray Island samples according to source of material, by Marcus Isaac Goldman. . 249 



Chemical composition 254 



Bottom samples from the Bahamas 262 



Samples from behind reef off Cocoanut Point, east side of Andros Island 263 



Comparisons with samples from behind Murray Island reef 264 



Precipitation of CaCOs in the ocean and the possibility of its solution in the sea 265 



Finely divided mud from stagnant areas in South Bight 268 



Samples from off the west end of South Bight 271 



Shore specimen, north of west end of South Bight 274 



Oolitic sand from Great Bahama Bank 274 



Globigerina ooze from the Tongue of the Ocean 276 



Elevated Bahaman oolites 277 



Summary on bottom deposits of the Bahamas 278 



Bottom samples from Florida 280 



Beach sand from Sands Key 281 



Lagoon samples 281 



Sample from between Loggerhead and Cudjoe Keys 281 



Samples from Marquesas Lagoon 282 



Samples from Tortugas Lagoon 283 



Sample from off Key West 284 



Elevated oolite 285 



Summary on bottom samples from Florida 285 



Conclusions 287 



Foraminifera from Murray Island, Australia, by Joseph A. Cushman 289 



Calcareous algae from Murray Island, Australia, and Cocos-Keeling Islands, by Marshall A. Howe 291 



Diatoms from Murray Island, Australia, by Albert Mann 297 



Richard Bryant Dole: In Memoriam 298 



Salinity of ocean water at Fowey Rocks, Florida, by Richard B. Dole and Alfred A. Chambers 299 



The solubility of calcite in sea-water in contact with the atmosphere, and its variation with temperature, 

 by Roger C. Wells 316 



LIST OF PLATES. 



PAGE 



Plate 94. Graphic illustration of mechanical analyses of bottom samples 244 



95. Map of Great Bahama Bank and southern Florida, showing position of bottom sample stations. . 262 



96. Murray Island foraminifera 290 



97. Figs. I, la, Polylrema mineaceum (Linn.); fig. 2, Goniolithon orthoblastum (Heydrich) Howe 296 



98. Goniolithon orthoblastum (Heydrich) Howe 296 



99. Map, Florida keys and reefs, from Key Biscayne to Ragged Keys 296 



TEXT FIGURES. 



PACE 



Figure 3. Map of Bethel Entrance, Andros Island, Bahamas, showing position of bottom sample stations 



190-193 262 



4. Diagrammatic section from Mangrove Cay across the barrier reef, Andros Island, Bahamas 279 



5. Graph showing daily content of chloride of sea-water at Fowey Rocks and daily precipitation at 



Miami, Florida, September 12, 1914, to October 17, 1915 311 



6. Graph showing daily content of chloride of sea-water at Fowey Rocks and precipitation at Miami, 



Florida, by selected periods during 1914 3 '^ 



237 



