Composition and Distribution of Macrobenthic Invertebrate Fauna 



143 



tent increased, but mean biomass was fairly uniform, 

 between 0.01 and <0.01 g/m 2 (Tables 26, 28; Fig. 145). 

 Frequency of occurrence of pycnogonids in samples 

 also diminished as organic carbon content increased, 

 ranging from 3 to 1% (Table 30). 



\i at Im id. i — One specimen of the class Archnida, order 

 Acarina, family Halicaridae (water mite) was collected 

 during the course of this study. This specimen was 

 taken at station 1130, located at a depth of 86 m on the 

 northeastern edge of Georges Bank. Sediment at this 

 location was sand, and the temperature range was be- 

 tween 4° and 7.9°C. 



Because of the small size of members of the family 

 Halicaridae, only a very small proportion of diem (the 

 largest specimens) are components of the macrobenthos. 



Adjusted statistics for this group are contained in 

 Tables 3 and 5 for overall faunal relationship and in 

 Tables 6 through 30 for relationships to the considered 

 parameters. 



Crustacea — The class Crustacea in the New England 

 region contains representatives from nine orders, each 

 of which will be discussed separately below. At least 

 three of these orders, Amphipoda, Cumacea, and 

 Cirripedia, rank as dominant components of the macro- 



