CONTENTS 



Introduction 1 



Methods and Materials 2 



The Canyon Environment 3 



Physical 3 



Biological 6 



Standing Crop 6 



Density of Organisms 7 



Community Assemblages 9 



Sample Associations, Methods 13 



The Canyon Associations 18 



The Borderland Basins 20 



The Amphipoda 21 



Frequency of Amphipoda in Basins and Canyons 21 



Diversity and Dominance of Amphipoda in the Canyons ... 22 



Ascent and Descent of Species in the Canyons and Basins . . 23 



Depth Distribution of the Amphipoda in the Canyons and Basins 26 

 Comparison of the Faunal Composition of Canyons and Basins 



with that of the World Bathyal Zone 27 



Prospectus ^^ 



Summary ^^ 



Acknowledgments •^■+ 



Tables ^^ 



Systematics of Amphipoda 52 



Literature Cited . . . . ^o 



Appendices '^-^ 



I List of Amphipoda in Canyons by Depth 10- 



II List of Amphipoda by Basin 'Ob 



III Distribution of the Submarine Canyon Samples with 



Depth, their Sediments and Amphipoda 110 



Plates ^^-^ 



Index ^^^ 



