• BOSTON ^V^> 





IDUNELLA SP A 



■f 



^L^ 



Figure 19.— Geographic distribution of species (^otn the family Liljeborgiidae in the Middle Atlantic Bight. 



lives in the tubes of polychaetes (e.g., Amphitrite or- 

 nata) in low intertidal and shallow subtidal depths. We 

 collected L. barnardi at a single station in Delaware Bay 

 in 22 m on a sand bottom (Fig. 19). The scarcity of L. 

 barnardi in our collections is probably due to its 

 preference for depths shallower than we routinely 

 sampled. 



Family LYSIANASSIDAE 



Anonyx lUjeborgi Boeck 1871 



This cold-water species is known to occur from the 

 Canadian subarctic to Delaware between intertidal 

 depths and 200 m on sand bottoms (Bousfield 1973). We 

 collected A. lUjeborgi at 16 stations between Cape Cod 

 and New Jersey (Fig. 20). Its mean density was low 

 (20/mO, ranging between 2/m^ and 80/m^. Our collec- 

 tions occurred between 38 and 92 m, but 75% of the rec- 

 ords came from between 40 and 70 m. One sample of i4. 

 lUjeborgi occurred on sandy silt, but the other 15 rec- 

 ords came from sand bottoms. 



Anonyx aarsi Steele and Brunei 1%8 



This epibenthic scavenger is circumpolar, and it has 

 been reported south to Rhode Island along the eastern 



coast of North America (Bousfield 1973). Anonyx sarai 

 was a rare species in our collections, occurring at only 

 three stations between Martha's Vineyard and central 

 New Jersey (Fig. 20). Our records extend the known 

 range of A. sarsi to central New Jersey. Its density was 

 low at all three stations (2-20/m^). The three occurrences 

 were between 38 and 65 m on sand bottoms. 



Cheirimedon sp. A 



A single specimen of this undescribed species was col- 

 lected from abyssal waters (2,435 m) south of Cape Cod 

 on a clay bottom (Fig. 20). 



Hippomedon propinquus G. O. Sars 1895 



Geographic Distribution. This species is widely dis- 

 tributed in the boreal North Atlantic (Stephensen 

 1935). Shoemaker (1930a) recorded H. propinquus from 

 numerous locations around Nova Scotia and New- 

 foundland. Our collections of H. propinquus from 24 sta- 

 tions between Cape Cod and Cape Hatteras greatly ex- 

 tend the range of this species along the eastern North 

 American coast (Fig. 20). It occurred in low densities at 

 all stations ranging from 2/m^ to 70/m^ with a mean of 

 20/m-'. It is much more common in the northern portion 

 of the Middle Atlantic Bight being restricted to the shelf 

 edge south of Long Island. 



34 



