248 U.S. NATIONAL MUSEUM BULLETIN 2 27 



enlarged and extending well forward beyond the prostominm. Dorsal 

 cirri shorter, atrophied toward setiger 30. Ventral cirri subulate on 

 first 2 setigers. First 2 setigers (fig. 65a) with presetal lamellar 

 process large, flat, curved around acicular setae. Acicular hooked 

 setae stout, amber-colored, hooded (unless worn), bidentate (may be 

 worn appearing unidentate). Two long anal cirri. 



Color: variable, bluish with red transverse stripes; whitish yellow 

 with violet brown bands, with rust colored spots on bases of para- 

 podia and cirri. Tube: free, elongate rectangular, greatly flattened, 

 scabbard shaped, formed of a thin transparent, parchmentlike lining 

 which is more or less completely covered with small to large, angular, 

 flattened fragments of shells, stones, pebbles, shale. The lumen of 

 the tube is about twice as wide as high, completely fiUed by the 

 worm. The worm extends out anteriorly from the tube and may 

 drag it along, much like the case of a caddisfly larva. 



Biology. — Found at low water and dredged on bottoms of mud, 

 ooze, gravel, rock, and various combinations of mud, sand, gravel, 

 rocks, coral, and broken shells. One of the most abundant poly- 

 chaetes in northern waters. Breeding individuals taken in August 

 and September in the Woods Hole region (Moore, ms.). Found in the 

 stomach of haddock (Georges Bank, 1954, 1955, R. Wigley). Some 

 specimens found to be parasitized by the arabellid Drilonereis caulleryi 

 (Pettibone, 1957b; see also p. 274). 



Material examined, — Numerous specimens from Gulf of St. 

 Lawrence (Gaspe Bay, Bay of Chaleurs, south of Anticosti Island), 

 Nova Scotia, Newfoundland to off Florida, Albatross stations, in 13 

 to 1,073 fathoms. 



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

 Faroes to France, Mediterranean, Labrador to Florida, West Indies, 

 Bering Sea to British Columbia, southern California to Colombia, 

 north Japan Sea to Japan, Indian Ocean, South Africa, New Zealand. 

 Low water to 2,233 fathoms. 



Onuphis (Onuphis) eremita Audouin and Milne-Edwards, 1833a 



Figure 65c 



Onuphis eremita Fauvel, 1923, p. 414, fig. 163,a-Z; 1953, p. 257, fig. 129,a-Z.— 

 Monro, 1930, p. 128, fig. 47; 1934, p. 370.— Hartman, 1944d, p. 75.— Rioja, 

 1947b, p. 519.— Wesenberg-Lund, 1949, p. 315.— Tebble, 1955, p. 118.— 

 Fauvel and RuUier, 1959, p. 938.— Hartman, 1960b, p. 99. 



Onuphis emerita Day, 1960, p. 336. 



Description. — Length up to 120 mm., width up to 2 mm., segments 

 up to 200. Prostomium without eyes. Ceratophores of occipital 

 antennae long, ringed (14-25 rings). Dorsolateral pair of occipital 

 antennae longer than the median unpaired one. Branchiae begin on 



