POLYCHAETE WORMS, PART 1 77 



Biology. — Found at low water in sand, in beds of Mytilus edulis, 

 on tubes of Diopatra cuprea. Dredged in sliallow waters on bottoms 

 of sand, clay, mud and shells. Appear in surface waters (Vineyard 

 Sound, August 1881). Specimen found in a very thick mucous 

 sheath (Cape Cod Bay, 17 fathoms). 



^Iaterial examined. — Maine (Albatross III, 41° 54' N., 68° 18' 

 W., 100 fathoms, 1955, R. Wigley), Massachusetts (Vineyard Sound, 

 27 fathoms; Wellfleet, Cape Cod; Cape Cod Bay, 17 fathoms), Rhode 

 Island (U.S. Fish Commission Location 815, off Block Island Light, 29 

 fathoms, 1880), New Jersey (Raritan Bay), Maryland (Chesapeake 

 Bay, Fish Hawk Station 8898, 15 fathoms, 1920; Station 8966, 10 

 fathoms, 1921), Florida (Seahorse Key, 1960, J. Taylor). 



Distribution. — Maine to Chesapeake Bay. Low water to 100 

 fathoms. 



Paranailis kosteriensis (IMalnigren, 1867) 



Figure 17d 



Phyllodoce (Anaitis) kosteriensis Fauvel, 1923, p. 157, fig. 56,a-c. — Clark, 1960, 



p. 16. 

 Paranaitis kosteriensis Pettibone, 1956a, p. 554. — Eliason, 1962, p. 234. 



Description. — Length up to 85 mm., width up to 4 mm., segments 

 up to 155. Body rather slender, flattened dorsoventrally, slightly 

 attenuated anteriorly and posteriorly. Prostomium with a nuchal 

 papilla (may be retracted). Without color or kregularly streaked 

 deep purplish (in alcohol). 



Biology. — Dredged on bottoms of mud, mud and sand. 



Material examined. — North Atlantic {Albatross Station 2084, 

 40°16' N., 67°05'W., 1,290 fathoms, 1883; Station 2231, 38°29' N., 

 to off 73° 09' W., 965 fathoms, 1884). 



Distribution. — Sweden, Denmark, Scotland, Ireland, Labrador 

 to off Delaware. In 6 to 1,290 fathoms. 



Genus Phyllodoce (Savigny, MS.) Lamarck, 1818 



Type (monotypy): Phyllodoce laminosa (Savigny, ms.) Lamarck, 

 1818. 



Subgenus Ariaitidcs Czcrniavsky, 1882 



Type (designated by Bergstrom, 1914, p. 77): Anaitides groenlandica 

 (Oersted, 1842). 



All four species have the body elongate, linear, with numerous 

 segments, attentuated posteriorly. Prostomium (fig. 18a) cordiform, 

 notched posteriorly with a nuchal tubercle in the notch (may be 

 withdrawn) rounded anteriorly, slightly indented at the level of the 

 4 short subequal frontal antennae, with 2 eyes, with a pair of nuchal 



