CONTENTS 



Page 



Introduction 1 



Methods 1 



Results 2 



Hydrography 2 



Sediments 2 



Biota 4 



The medium sand assemblage 4 



The fine silty sand assemblage 4 



Aggregations of Mytilus edulis 4 



Discussion 4 



Acknowledgments 5 



Literature cited 5 



Appendix 6 



Figures 



1. RV Challenger survey, 1966-67. Locations of transects and collecting stations 2 



2. The Petersen grab sampling a medium sand bottom station; sand dollars, Echina- 

 rachnius parma are evident on surface 3 



Appendix Tables 



1 . Locations of collecting stations 6 



2. Water depth and sediment types at collecting stations 7 



3. List of species collected on survey 10 



4. RV Challenger survey, 1966-67. Benthic grab collection records 12 



5. Benthic organisms abundance and diversity 50 



in 



