TABLE 4. Number of species (S), number of individuals (N) and percentage of the total (%) for each 

 major taxon collected at Millstone subtidal stations September 1985 - June 1987, with ranges from 

 1980-85. 



during 1986 and 1987. The number of polychaete 

 species ranged from 49 (IN) to 75 (GN). 

 Arthropods were the second most diverse group 

 at GN, JC and IN. The numbers of mollusc 

 species were similar to the numbers of arthropods 

 at all stations. 



Wlien results obtained over the last two years 

 were compared to those of the 1980-85 period, 



differences in overall community composition 

 were evident. There was a general trend in 1986 

 and 1987 for higher species number and abun- 

 dances at GN, IN and JC, but not at EF. Al- 

 though most observations for 1986-87 were within 

 the range of previous years, values tended to be 

 nearer the upper bounds than lower ones. For 

 example, numbers of molluscs and arthropod spe- 

 cies, as well as the abundance of artliropods col- 



