200 U.S. NATIONAL MUSEUM BULLETIN 2 27 



Color: white or brownish, with red middorsal blood vessel, red 

 branchiae and midventral red streak, setae dark. 



Biology.' — Found rarely at low water in mud. Dredged on bottoms 

 of soft or sticky mud, muddy sand, very fine or coarse sand, mud 

 with gravel, shells, worm or amphipod tubes, and "weed" (Lagoon 

 Pond, Martha's Vineyard). They burrow in mud of all kinds, even 

 in that so filled with decaying debris as to be very fetid. They are 

 the most common and abundant species on mudd}'' bottoms along 

 the New England coast, in bays and sounds as well as off the open 

 coast. They were found in the stomach of peaked-nose skate (Verrill) 

 and haddock (Georges Bank, 1953, R. Wigloy). Nothing is known 

 concerning its embryology. Specimens with coral pink eggs were 

 found in August in Massachusetts (Buzzards Bay, August 11, 1953). 

 Young specimens of 28-32 segments were found in August in Maine 

 (Ebenecook Harbor, Southport Island, August 2, 1955; Muscongus 

 Bay, August 29, 1955); they had prominent pointed conical acicular 

 lobes without much sign of lamellae. 



Material examined.' — Numerous specimens from Gulf of St. 

 Lawrence (Gaspe Bay, Bay of Chaleurs, 3 to 12 fathoms). Nova 

 Scotia (Albatross III, 42° 10' N., 69° 58' W., 80 fathoms, 1955, R. L. 

 Wigley), New Brunswick (west Quoddy Bay), Prince Edward Island 

 (Richmond Bay), Maine (Muscongus Bay near Hog Island; Boothbay 

 Harbor region, Morgan's Bay, north end Long Ledge, Sheepscot 

 River; Middle Cove and Love's Cove in Ebenecook Harbor, Southport 

 Island; cove, southeast Barter Island; Cross River off Sheepscot), 

 New Hampshire (Portsmouth Harbor), Massachusetts (Gloucester 

 Harbor, Massachusetts Bay, Cape Cod Bay, Vineyard Sound, Nan- 

 tucket Sound, Buzzards Bay, low water to 28 fathoms). 



Distribution.- — Greenland, Davis Strait, Iceland, Norway, Sweden, 

 North Sea, Baltic to Portugal, Mediterranean, Gulf of St. Lawrence 

 to Virginia, Chesapeake Bay. Low water to 954 fathoms. 



Nephtys paradoxa Malm, 1874 



Figure 47d 



Nephthys canadensis Mcintosh, 1900, p. 264, pi. 7, fig. 1, pi. 8, figs. 4-6.— Whit- 

 eaves, 1901, p. 83. 



Nephthys paradoxa Fauvel, 1923, p. 375, fig. 146,/-f. — Wesenberg-Lund, 1953, 

 p. 44.— Uschakov, 1955, p. 217, fig. 69. 



Nephtys paradoxa Hartman, 1944a, p. 339, pi. 15, fig. 6. — Pettibone, 1954, 

 p. 271, fig. 30,y-A;.— Eliason, 1962, p. 249. 



Description.^ — Length up to 200 mm., width up to 13 mm., 

 segments up to 150. Tentacular segment with ventral tentacular 

 cirri larger than the antennae, dorsal tentacular cirri reduced to a 

 tubercle. Parapodia (fig. 47c^) with notopodial acicular lobes rounded, 



