POLYCHAETE WORMS, PART 1 181 



characteristically found in clean, fresh, circulating water. Taken 

 from the Atlantic cod Gadus callarias (Grainger, 1954) and from the 

 stomach of haddock (Georges Bank, 1953, 1954, R. Wigley). Four 

 male heteronereids were taken from the stomach of herring in the 

 Gulf of St. La^\Tence. 



Sexual epitokes appear sporadically at varying times of the year 

 and may appear in surface waters. They have been reported in 

 December to January in the English Channel, April to May and 

 October near Iceland, in August in Norway (Wi'son, 1932; Thorson, 

 1946), in April in Denmark (Rasmussen, 1956), in July and August 

 in Canadian Arctic (Grainger, 1954). They were found in Labrador 

 in August (60 fathoms), \Voods Hole, Massachusetts in March 

 (surface). Cape Cod Canal in May (surface), and vicinity of Eastport 

 and Penobscot Ba}^ and Mount Desert region in October (1 to 

 30 feet). Wilson (1932) followed its early development and found it 

 to have pelagic larvae. 



Material examined. — Numerous specimens from Labrador, 

 Gulf of St. Lawrence, off Newfoundland, Nova Scotia, New Bruns- 

 wick, Maine (vicinity Eastport, Mount Desert region, Penobscot 

 Bay, Rockland, Muscongus Bay, Boothbay Harbor region. Sea 

 Point near Kittery, Cape Neddick, York), New Hampshire (Isles 

 of Shoals, Fort Stark, Newcastle, Jije Harbor, Hampton Harbor), 

 Massachusetts (Georges Bank, Beverley, Cape Ann, Cape Cod, 

 Martha's Vine3^ard, Ehzabeth Islands, Vineyard Sound, Buzzards 

 Bay, Nantucket), Rhode Island (Narragansett approaches), Con- 

 necticut, Long Island Sound, in low water to 250 fathoms; sexual 

 forms at surface. 



Distribution. — Widely distributed in the Arctic. Also Iceland, 

 Norway to Mediterranean, Azores, West Africa, Hudson Bay to 

 Long Island Sound, Florida (Key Largo), Bering Sea to Panama, 

 Mexico, north Japan Sea to Japan, South Atlantic (Tristan da 

 Cunha, Kerguclcn, Magellan Straits). In low water to 609 fathoms; 

 sexual heteronereids at surface. 



Nereis zonata Malmgrcn, 1867 



Figure 42c 



? Nereis tenuis Webster and Benedict, 1884, p. 718, pi. 3, fig. 37, pi. 4, figs. 38-43.— 



RFiner, 1950, p. 318, pi. 104. 

 Nereis zonata Fauvel, 1923, p. 338, fig. 130. g-n (part).— Pettibonc, 1954, p. 265, 



fig. 30,c,/i-z; 195Ga, p. 557.— Uschakov, 1955, p. 212, fig. GG.— Eliason, 19G2, p. 250. 



Description. — Length up to 125 mm., width up to 7 mm., segments 

 up to 100 or more. Body slender, cylindrical, with integument smooth, 

 not ^vrinkled. Tentacular cirri rather short, subequal, longest may 

 reach setiger 2. Parapodia (fig. 42c) similar throughout the length 



