31. 



borealiSf the large burrowing anemone Cerianthus borealis 

 (Fig. 13b) and the quill worm Eyalinoeaia artifex (Fig. 13d) . 

 M, valida and A. vulgaris dominate the shelf fauna (100 to 

 200 meters) . The white sea pen is found in localized areas 

 between the depths of 200 to 300 meters, while Cancer borealis 

 with occasional occurrences of Cerianthus borealis^ dominates 

 the slightly deeper fauna. Eyalinoeaia artifex is the most 

 common species found between 300 to 500 meters on the walls in 

 the lower part of the canyon and in various areas in the axis. 

 Within the shallow-water depth range only one area was encoun- 

 tered, in the photographic survey, that has a totally different 

 faunal composition. This area is located between 100 and 300 

 meters depth on the west wall in the middle of the canyon, and 

 is characterized by a large boulder deposit. The surfaces of 

 these boulders are covered by numerous large white anemones 

 (Fig. 13a) . In addition, several species of crabs and fish 

 are also found in this area. This region is very unique, in 

 terms of faunal composition and absolute abundance, when 

 contrasted to other areas of the canyon within this depth 

 range. Similar boulders and anemones were also retrieved in 

 a dredge taken on the east wall of the canyon. Norfolk Canyon 

 also has several areas with similarly high concentrations of 

 this white anemone attached to cobbles (encountered on ALVIN 

 Dive 574 and Robert Embley, pers. comm. ) . At this time there 

 is insufficient ancillary data available to determine what 



