6-25 



nearshore coarse-grained stations, particularly Stations C and G. There 

 was no apparent seasonal or annual variation observed in Glycera den- 

 sities (Figure 6-4) . 



The remaining ubiquitous polychaete, Polydora ligni , did not 

 occur with sufficient frequency at any stations to show a clear pattern 

 of distribution and, indeed, was never present in more than 50% of the 

 samples from any single station (Figure 6-2) . However, its distribution 

 was generally similar to that of Glycera with only scattered occurrences 

 in the inner harbor and more consistent occurrence in Morris Cove, 

 particularly at coarser grained sediment stations. Densities and fre- 

 quency of station occurrence data show no seasonal patterns, but seem to 

 have increased since August 1976 (Figure 6-4) . 



Of the four molluscan species included in Figure 6-3, only 

 Telliiia agilis and Mulinia lateralis were present in a sufficient number 

 of samples to allow generalized statements about their patterns of 

 distribution. Both were present in limited numbers in the inner harbor. 

 Both species were often collected at Stations 8 and 8N. Tellina also 

 occurred at Stations 4, 4A, 9 and 10 in greater than 25% of the samples 

 while Mulinia was also frequently present only at Station 5N. Both 

 bivalve species were collected most often from stations in Morris Cove. 

 Tellina was considerably more abundant than Mulinia. Mulinia was pres- 

 ent in over 50% of the samples only at Station F, while Tellina was 

 present in greater than half of the samples from nearly all stations in 

 the Cove, reaching its greatest frequency of occurrence (87%) at Station 

 C. This species was least abiindant at Station F, where it was present 

 in only 25% of the samples. Tellina was generally most abundant in the 

 shallower areas of the cove, where Mulinia was least abundant. Densi- 

 ties and station occurrences were variable with some indication of 

 summer/ fall recruitment (Figure 6-4). For Mulinia, 1975 and 1977 were 

 years of particularly high abundance. For Tellina, 1977 was the year of 

 highest density. 



The remaining ubiquitous species are generally too sparse to 

 allow detailed analysis of their distributions. Oligochaetes (Figure 



