6-20 



Gemma gemma 



Mulinia lateralis 



f^. 25-50 % 

 N^ 51-75% 

 la > 76% 



Nassarius trivittatus 



v.N^;S 51-75% 



■1 >7e% 



Figure 6-3. Spatial distribution of New Haven Harbor characteristic 

 benthic mollusc species with frequency of occurrence 

 values. New Haven Harbor Ecological Study Summary 

 Report, 1979. 



