Table 1. Ridge stations of equal depths (18 meters) 

 in order of increasing sediment stability 

 from left to right^. 



Fauna 



Stations 



R26 



R27 



R28 



R29 



Worms 



140 



160 



240 



230 



Crustaceans 



390 



510 



480 



140 



Mollusks 



12 



36 



80 



85 



Sand dollar 



40 



200 



80 



25 



^Mean numbers of organisms per 0.018 square meter 

 times 10. 



Table 2. Comparison of fauna at control stations (C) in 

 stable areas with fauna at canyon stations (P) 

 at 6-, 10-, and 20-meter depths. 



Fauna 



Stations 



C6 

 (6 



P6 

 m) 



CIO PIO 

 (10 m) 



C20 P20 

 (20 m) 



Worms 



43 



20 



196 64 



420 400 



Crustaceans 



390 



63 



300 106 



143 84 



Mollusks 



136 







120 



54 



Sand dollars 











280 



44 



16 



