204 U.S. NATIONAL MUSEUM BULLETIN 2 27 



Nephtys caeca Hartman, 1944a, p. 333, pi. 15, fig. 10 (as N. ciliata); 1948, p. 24; 



1950, p. 95.— Hartman and Reish, 1950, p. 18.— Clark, 1955, p. 547; 1957, 



p. 269.— Stickney, 1959, pp. 14, 15. 

 Nephthys coeca Gorbunov, 1946, p. 38. — Thorson, 1946, p. 71, fig. 34. — Wesen- 



berg-Lund, 1950a, p. 20; 1950b, p. 67; 1951, p. 43. 



Description. — Length up to 250 mm., width up to 15 mm., seg- 

 ments up to 150. Tentacular segment with dorsal and ventral pairs 

 tentacular cirri subequal. Parapodia (fig. 516) with acicular lobes 

 bilobed to rounded. Anterior lamellae rudimentary ; posterior lamellae 

 long, oval, foliaceous throughout the length of the body, the neuro- 

 podial lamellae extending further than the notopodial. Tips of acic- 

 ula covered with yellow chitinous plates. Preacicular setae short, 

 barred; postacicular setae long, yellow, finely spinous. Ventral cirri 

 short, conical; dorsal cirri digitiform. Branchia cirriform, sickle 

 shaped, begin on setigers 4-6, continuing to near posterior end. Color: 

 white, dusky, greenish or greenish bronzy. 



Biology. — Found at low water in shifting sand, muddy sand, 

 gravelly sand, mud with rocks and gravel. Dredged on bottoms of 

 clean sand, soft mud, muddy sand, mud and broken shells and gravel. 

 Found in the stomach of haddock (Georges Bank, 1953, K.. Wigley). 



Material examined. — Numerous specimens from Gulf of St. 

 Lawrence (Gaspe Bay, Bay of Chaleurs, St. Lawrence estuary, 

 Madeleine Islands, low water to 26 fathoms), Nova Scotia (Cape 

 Breton Island), New Brunswick (St. Andrews), Maine (Red Beach 

 and Robbinston, St. Croix River; Starboard Creek, Machias Bay; 

 Glen Cove, mouth Penobscot Bay; Samoset Point, Rocldand; Booth- 

 bay Harbor region; Waites Landing, Falmouth Foreside; Sea Point 

 near Kittery), New Hampshire (Hilton Park, Dover Point; Little 

 Harbor, Sheaf es Point; Newcastle and Wentworth; Rye Harbor, 

 Hampton Harbor), Massachusetts (Georges Bank, 39-66 fathoms; 

 Essex; Duxbury, Marblehead; Cape Cod, Orleans and Barnstable; 

 Nantucket Sound; Cuttyhunk; Hadley Harbor, Nonamesset Island), 

 Washington (Puget Sound and Washington Sound, low water to 

 50 fathoms). 



Distribution. — Scattered records in the Arctic (Siberian and Alas- 

 kan Arctic, Greenland, Spitsbergen). Also Iceland, Faroes, Norway 

 to North Sea, Baltic, English Channel, Gulf of St. Lawrence to off 

 Rhode Island; Alaska to northern California; north Japan Sea to 

 Japan. Low water to 306 fathoms. 



Nephtys longosetosa Oersted, 1843 



Figure 47a 



Nephthys longisefosa Verrill, 1881, pp. 295, 319. — Not Malmgren, 1865. 

 Nephthys longosetosa Fauvel, 1923, p. 367, fig. 143, /-/i. — Uschakov, 1955, p. 219, 

 fig. 68.— Southward, 1956, p. 264.— Clark, 1960, p. 20. 



