258 U.S. NATIONAL MUSEUM BULLETIN 2 27 



Description. — Length up to 170 mm., wddth up to 1.5 mm., 

 segments up to 140. Parapodia similar along length of body. 

 Presetal lobe short, rounded. Postsetal lobe prominent, digitiform, 

 directed laterally or obliquely upward. Anterior parapodia with 

 capillary, arched limbate setae and compound hooded hooks with 

 rather short blades (fig. 67/). Middle and posterior parapodia 

 with mostly simple hooded hooks. Acicula yellow. Proboscis with 

 maxillae ii each with 4-6 teeth; maxillae iii each with 2 teeth (3-4 

 in var. inflata); maxillae iv each with a single tooth (or 2 in var. 

 inflata). Color: orange red to pale yellow orange. 



Biology. — Found at low water under stones, inhabiting crevices 

 in calcareous algae (Lithothamnion), in roots of sea basket grass 

 (Phyllospadix) , and among serpulids. Dredged on bottoms of mud, 

 muddy sand, sand, among serpulids, bryozoans, shells, and coral rock. 



Material examined. — Numerous specimens from Washington 

 (Strait of Juan de Fuca, Washington and Puget Sound, low water 

 to 140 fathoms), Alaska (New Harbor, Unga Island, low water, 1872, 

 W. H. Dall), off Massachusetts {Albatross III, 42°20' N., 66°45' W., 

 182 fathoms, 1957, R. Wigley; U.S. Fish Commission Location 945, 

 39°58' N., 71°13' W., 207 fathoms, 1881; Location 998, 39°43' N., 

 71°32' W., 302 fathoms, 1881; Albatross Station 2249, 40°11' N., 

 69°52' W., 53 fathoms), off Florida (Albatross Station 2415, 30°44' 

 N., 79°26' W., 440 fathoms; Seahorse Key; Key West), West Indies 

 (Boqueron Bay and Mayaguez Harbor, Puerto Rico; St. Thomas 

 Island). 



Distribution.- — ^English Channel to Mediterranean, off Massa- 

 chusetts to Florida, Bermuda, West Indies, Gulf of Mexico, Alaska 

 to Gulf of California, Japan, West and South Africa. Low water to 

 710 fathoms. 



Lumbrineris latreilli (Audouin and Milne-Edwards, 1833a) 



Figure 67,o-c 



Lumhriconereis latreilli Fauvel, 1923, p. 431, fig. 171, m-r; 1953, p. 266, fig. 



134,m-r; 1957b, p. 214.— Okuda, 1946, p. 120, pis. 12, 13.— Wesenberg-Lund, 



1949, p. 315; 1950a, p. 28; 1950b, p. 71; 1951, p. 57.— Fauvel and Rullier, 



1959, p. 947. 

 Lumbrineris latreilli Hartman, 1944d, p. 158, pi. 9, figs. 213-216. 

 Lumhrinereis latreilli Berkeley and Berkeley, 1948, p. 98, figs. 154-156. — Day, 



1953, p. 435; 1957, p. 94; 1960, p. 361.— Rioja, 1958, p. 268.— Clark, 1960, 



p. 23. 



Description.^ — Length up to 300 mm., width up to 5 mm. 

 Parapodia with presetal lobe short, rounded, with postsetal lobe 

 longer, bluntly cirriform, projecting obliquely upward. Anterior 

 parapodia with simple arched limbate setae and compound hooded 

 hooks (fig. 67,6,c). Middle and posterior parapodia with few 



