A-45, 



Anthomastus grandif torus and Pennatula sp. (6) and 

 Aoanella arbusaula (3) are restricted to soft substrates. 

 Their distributions have been discussed in detail in the 

 community analysis of the total fauna. Flabetlum alabastrum 

 (5) and Distiohoptilim graaile (1) are both found on soft 

 substrates and are present throughout the deeper part of the 

 study area. It should be mentioned that the distribution of 

 both of these species may, in fact, be composites of more 

 than one species. Both are rather small making detailed 

 identification from photographs, on species characteristics, 

 impossible. One interesting assemblage is composed of 

 Eunephthya fruticosa and Pennatula sp. (10). This assem- 

 blage is restricted to the deeper parts of Hudson and 

 Norfolk Canyons. Abundant populations of large individuals 

 of Eunephthya fruticosa were found only in the deeper part 

 of Hudson Canyon. 



In general the corals in our study area do not occur as 

 discrete communities, but rather tend to co-exist in some 

 regions and not in others. The corals found on hard sub- 

 strates are restricted to canyons where outcrops and boulders 

 provide suitable habitats. Several of the coral species 

 whose distributions are similar within our study area are 

 recognized as members of dispecific assemblages. It might 

 be inferred that the habitat requirements of these species 

 are quite similar. Closer examination of the coral 



