118 U.S. NATIONAL MUSEUM BULLETIN 227 



Distribution. — British Isles, France, Madeira, Azores, Canaries, 

 Mediterranean, Massachusetts to Florida, Bermuda, West Indies, 

 Black Sea, Red Sea, Persian Gulf, Indian Ocean, West and South 

 Africa, southern California to Panama. In low water to 127 fathoms. 



Syllis cornuta Ralhke, 1843 



Figure 31,t,j 



Syllis -pallida ? Verrill, 1875, p. 39, pi. 3, fig. 6.— Webster and Benedict, 1887, p. 



717 (in USNM).— ?Sumner, Osburn, and Cole, 1913, p. 615. 

 Syllis (Ehlersia) cornuta Fauvel, 1923, p. 267, fig. 100; 1953, p. 153, fig. 7Q,g-i; 



1957b, p. 214.— Monro, 1939, p. 111.— Wesenberg-Lund, 1953, p. 35.— 



Pettibone, 1954, p. 253, fig. 28/.— Tebble, 1955, p. 90.— Banse, 1959, p. 429.— 



Fauvel and Rullier, 1959, p. 71.— Clark, 1960, p. 18. 

 Ehlersia cornula Hartman, 1945, p. 15. 

 Ehlersia near cornuta Hartman, 1951, p. 42. 

 Syllis (Ehlersia) near cormda Reish, 1959, p. 80. 



Description. — Length up to 45 mm., width without setae up to 

 1.2 mm. Prostomium with 2 pairs of eyes, anterior pair larger, 

 crescentric, with or without a pair of small ocular spots anterior to 

 lateral antennae. Monihform dorsal cirri with about 22 articles 

 (11-40). Neurosetae all compound, with longer and shorter blades, 

 the longer ones 2-4 times longer than the shorter ones, with fine 

 marginal fringe extending to near the tip (fig. 2,1, i,j). Bod}^ colorless 

 or with narrow reddish brown segmental transverse bands. 



Biology. — Found at low water on mud and sand. Dredged on 

 bottoms of sand, stones, rocks, with shells, sponges. Found in sponges 

 along with Syllis sjwngiphila and Eunice norvegica. Sexual stolons 

 have been observed in the plankton in the Alaskan Arctic in March 

 and April (Pettibone, 1954). 



Material examined. — Numerous specimens from Gulf of St. 

 Lawi-ence, Nova Scotia, Maine, Massachusetts, Georgia (Sapelo Island), 

 low water to 146 fathoms. 



Distribution. — Cosmopolitan. Widely distributed in the Ai'ctic. 

 Iceland, Norway to Madeira, Mediterranean, Gulf of St. Lawrence 

 to Florida, Red Sea, South Arabian Coast, Persian Gulf, Indian 

 Ocean, off West and South Africa, north Japan Sea, Alaska to Panama, 

 South Pacific, Antarctic. In low water to 1 ,400 fathoms ; sexual stolons 

 in plankton. 



Genus Eusyilis Malmgren, 1867 



Type (designated by Hartman, 1959a, p. 204): Eusyilis blomstrandi 

 Malmgren, 1867. 



Both species have the body elongate, slender, flattened ventrally, 

 arched dorsally, tapering slightly anteriorly and posteriorly. Pro- 

 stomium suboval, wider than long, with 2 pairs fairly large red eyes, 

 usually with an additional pair of small ocular spots near the palps. 



