Table 52. — Sediment associations of Dyopedot mona- 

 cantha in samples from Middle Atlantic Bight. 



ments between 5 and 40 m. In our samples, M. angusta 

 occurred at only a single station south of Cape Cod in 62 

 m on a silty sand bottom (Fig. 26). The scarcity of this 

 species in our collections is most likely a reflection of its 

 small size (3 mm) which may have allowed it to be 

 washed through a 1 mm sieve. 



Fanuly SYNOPimAE 



Syrrhoe crenulata Goes 1866 



This widely distributed cold-water si>ecies is known 

 from the arctic boreal regions of both the Atlantic and 

 Pacific Oceans between 10 and 300 m (Barnard 1971). 

 According to Bousfield (1973), Cape Cod Bay was the 

 known southern limit for this species off eastern North 

 America. Our collections of S. crenulata extend its 

 southern limit slightly since we found it in four grabs 

 from a single station south of Martha's Vineyard in 49 m 

 on a sand bottom (Fig. 26). 



Tiron tropakis J. L. Barnard 1972 



This warm-temperate species is reported to occur 

 from Virginia to Venezuela in the western Atlantic at 

 depths between 3 and 157 m (Barnard 1972). We col- 

 lected T. tropakis at a single station off the mouth of 

 Chesapeake Bay in 20 m depth on a sand bottom (Fig. 

 26). 



ACKNOWLEDGMENTS 



We thank our associates at the NMFS Biological 

 Laboratory at Woods Hole, Mass., particularly Gilbert 

 L. Chase, Jr., Betty Murray, Evan B. Haynes, Thomas 

 L. Morris, and Ruth Stoddard for assistance in col- 

 lecting and processing samples; Roger Theroux, Amy 

 Leventer, and Jacqueline D. Murray for their help in 

 data processing; and John Lamont for his assistance in 

 drafting the figures. We would also like to thank 

 members of the staff at the Woods Hole Oceanographic 

 Institution and U.S. Geological Survey, Woods Hole, for 

 assistance in collecting samples; crewmen aboard 

 research vessels; Ann Frame of the NMFS Sandy Hook 

 Laboratory, Sandy Hook, N.J., for her help in the 

 identification of the Haustoriidae; and Richard Lang- 

 ton of NMFS Woods Hole Laboratory, E. L. Bousfield of 

 the National Museum of Canada, Ottawa, and 



anonymous reviewers for their critical reading of the 

 manuscnpl and helpful suggestions for revision. 



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45 



