282 U.S. NATIONAL MUSEUM BULLETIN 227 



Thoracic neuropodial postsetal lobes with up to 7-15 papillae, with 

 several rows of pseudocrotchets, the tips enclosed in pointed sheaths, 

 with numerous crenulate capillary setae. Posterior few (3-5) thoracic 

 neuropodia with 4-8 stout brown speariike spines, the spines very 

 short (perhaps broken or enclosed) or protruding some distance, 

 especially the upper one (fig. 75c). Abdominal region with neuro- 

 podia unequally bilobed, the inner lobe short, roimded, the outer lobe 

 longer, tapered. Without interramal cirri; with thick conical sub- 

 podal papilla or ventral cirrus. Without subpodal ventral or stomach 

 papillae in thoracic region. Proboscis a frilled, rosettelike sac. 



Biology.' — Dredged on bottoms of sand and mud. 



Material examined.— Off Massachusetts (41°03' N., 66°14' W.) 

 to off Long Island Sound (37°12' N., 74°20' W.), Albatross Stations, 

 65-866 fathoms. 



Distribution.— Greenland, Norway, off Shetlands, North Sea, 

 Mediterranean, West Africa, south of Newfoundland to off Long 

 Island Sound, north Japan Sea, off southern CaHfornia, off Brazil, 

 Indian Ocean. In 34 to 1,340 fathoms. 



Orbinia {Phylo) michaelseni (Ehlers, 1897) 



Figure 75/ 



Aricia michaelsem Ehlers, 1897, p. 88, pi. 6, figs. 136-140.—? Not Monro, 1930, 

 p. 144, fig. 54.— Not Okuda, 1937b, p. 101.—? Not Berkeley and Berkeley, 

 1952, p. 96, figs. 194-196. 



Description. — Length? (more than 50 mm.), width up to 3 mm., 

 segments over 165. Thoracic setigers about 16 (16-19). Thoracic 

 neuropodial postsetal lobes with up to 9 papillae; anterior thoracic 

 neuropodia with about 4 rows of finely denticled pseudocrotchets 

 (the distal tips enclosed in sheaths tapered to fine tips) or crotchets 

 (blunt tips, sheath may be worn off), with a single row of crenulate 

 capillary setae. Posterior few (3-6) thoracic neuropodia with few 

 crotchets and with 5-6 heavy spines in anterior row, the spines 

 enlarged and grooved distally. 



Abdominal region with cirriform interramal chri, with conical 

 subpodal papilla or ventral cirrus (fig. 75/). Subpodal ventral or 

 stomach papillae on about setigers 12-21; where best developed, 

 they form nearly a semicircular ring. 



Biology. — Dredged on bottoms of mud and fine sand. 



Material examined. — Off Massachusetts (Albatross Station 2249, 

 40°11' N., 69°52' W., 53 fathoms). 



Distribution. — Oft' Straits of Magellan, off Massachusetts. In 

 2 to 53 fathoms. 



