274 U-S- NATIONAL MUSEUM BULLETIN 227 



Biology. — Found at low water in mud and fine to coarse sand. 

 Dredged on bottoms of gravel, gravel with sand or mud. Found in 

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



Material examined. — Off Newfoundland (Albatross III, 44°19' N., 

 67043/ Y^ ^ 1953^ ^ Wigley), Nova Scotia (Albatross Station 2521, 

 42°30' N., 65°02' W., 65 fathoms), Mame (type specimen from 

 Eastport, including sHdes with jaw pieces), Massachusetts (Georges 

 Bank, 40-600 fathoms, R. Wigley; south Martha's Vineyard, 27 

 fathoms; Vineyard Sound, 34 fathoms), North Carolina (Beaufort), 

 South Carolina (Coosans River, Fish Hawk, 1891), Gulf of Mexico 

 (Seahorse Key, Florida; off Yucatan), Washington (Callam Bay, 

 Strait of Juan de Fuca, 107 fathoms), California (Monterey Bay, 

 Type of D. jalcata). 



Distribution.— Off Newfoundland to South Carolina, Gulf of 

 Mexico, Washington, southern California to western Mexico, South 

 Africa. Low water to 600 fathoms. 



Drilonereis caulleryi Pettibone, 1957b 



FiGURK 71,f-g 

 Drilonereis caulleryi Pettibone, 1957b, p. 179, fig. 2. 



Description.— Length up to 110 mm., width up to 1 mm., segments 

 up to 400 or more. Prostomium conical, flattened dorsoventrally, 

 without eyes. Parapodia similar along length of body, unequally 

 bilobed, with shorter, rounded setal lobe and longer, thick, digitiform 

 postsetal lobe, with setae of two kinds: up to 5 limbate setae and single 

 stout yellowish acicular seta (fig. 71/; in smaller specimens, setae may 

 not project from parapodial lobe). Proboscis without mandibles, 

 with 4 pairs maxillae supported by pair of filiform maxillary carriers 

 and shorter unpaired piece. Maxillae i stout, falcate, forcepslike; 

 maxillae ii each with 4 teeth; maxillae iii and iv each with a single 

 large, thornlike tooth (fig. 71g). 



Biology. — Found living parasitically in anterior fragments of 

 Onuphis conchtjlega Sars, a single parasite per host. They enter the 

 host evidently at an early stage and may become so large that they 

 partly protrude from the host. The hosts, Kving in flattened parch- 

 mentlike tubes encrusted with stones and shells, are dredged on 

 bottoms of mud, fine sand, and shells. 



Material examined. — Types from off Massachusetts to off 

 Virginia. 



Distribution. — North Atlantic, off Massachusetts to off Virginia. 

 In 101 to 317 fathoms. 



