25. 



primarily silty. The axis of the canyon has predominantly 

 sandy sediment with sparse talus deposits. One particularly 

 interesting area encountered was on the west wall, between 

 100 to 300 meters, which had a deposit of numerous large 

 boulders. 



The shelf assemblage in Baltimore Canyon is dominated by 

 one trophic type, two species of crustaceans: the galatheid 

 crab Munida valida and the jonah crab Cancer horealis. 

 Slightly deeper on the canyon walls and in its head the fauna 

 is dominated by several trophic types represented by three 

 species: the crustacean Canoer borealis which is a carnivore 

 and scavenger, a fluffy white sea pen which is a filter- 

 feeder, and the burrowing anemone Cerianthus borealis which 

 is a carnivore. The fauna of the axis and canyon walls, 

 between 300 to 500 meters, is dominated by the scavenging quill 

 worm Hyalinoeoia artifex. This organism has a patchy distri- 

 bution and is present in very high concentration in regions 

 where it occurs. Slightly deeper in the axis and on some 

 parts of the mid-west wall two species of anemone predominate, 

 Botooera tuediae and a species of cerianthid. Bolooera tuediae 

 is restricted to hard substrates and was found on the occasional 

 talus blocks and cobbles in this area. The talus occurs 

 slightly downslope of where the canyon constricts and turns. 

 Below 600 meters in the axis and on the wall the fauna is 

 dominated by carnivores and scavengers: two types of demersal 



