^ 



Small spionid polychaetes (this species is Spio setosa , approximately 1 mm 

 body width) are common inhabitants of New England tidal flats. They construct 

 vertically positioned tubes in the sediment and feed on surface deposits with 

 a pair of grooved, ciliated palps. Photo by K.W. Kaufman, Johns Hopkins Uni- 

 versity. 



33 



