34, 



small shrimp that congregate around outcrops and boulders 

 (Fig. 15d) . The shallow water fauna is again dominated by 

 the galatheid crab Munida valida and the burrowing anemone 

 Cerianthus hoveatia . However, several other anemones, 

 Bolooera tuediae^ a small unidentified encrusting anemone 

 and what appear to be juvenile anemones are also found in 

 high concentrations in the shallower depth. Notably the 

 Jonah crab Cancer borealis ^ the starfish Asterias vulgaris 

 and the white sea pen do not dominate the shallow-water 

 fauna in Lydonia Canyon. However, the shallow water coverage 

 of this canyon is rather limited, so the fact that these 

 organisms did not dominate the areas surveyed may just be 

 a reflection of their patchy distribution, or the high 

 abundances of the small unidentified anemone. The quill worm 

 Hyalinoeoia artifex is again a dominant part of the fauna, 

 but is found in deeper water. The red crab Geryon quinquedens 

 and the eel Synaphobranahus kaupi are also important species 

 in the deeper parts of the canyon, while shrimp dominate the 

 fauna in areas that have exposed hard substrates. 



The principal components analysis of the fauna of Lydonia 

 Canyon results in 89% of the variance being explained by ten 

 end-members, or fourteen species. Seven of these end members 

 are monospecific, two are dispecific and one is composed of 

 three species. Again, this points to the fact that the majority 

 of the dominant species are independently distributed and thus 



