CONTENTS 



Introduction page 177 



Topography of the sea-bottom of the region J 77 



Distribution of sampling !79 



Collection of samples J 79 



Analysis of the samples J 8o 



Coarser materials J 8o 



Apparatus 180 



Method of use 180 



Finer materials 181 



Apparatus 181 



Method of use 182 



Distribution of the grades 184 



Types of deposit 189 



Description of the types 190 



Distribution of the types 193 



Distribution of the deposits by the texture of the samples as a whole . . 196 



The silt grounds 197 



Coarser grounds within the silt grounds 197 



The fine sand grounds 198 



Coarser grounds within the fine sand grounds 198 



Discussion 200 



Summary 201 



References • 202 



Tabulated data of the samples examined 203 



Plates I I-XIV following page 206 



