2a. Dorsal cirri becoming smooth and filiform after first few setigers 

 (Figure 30-116a); inferior falcigers of posterior body region with 



large subterminal tooth (Figure 30-116e) 



Syllis (Ehlersia) ferrugina, p. 30-122 



2b. Dorsal cirri articled and cirriform throughout; inferior falcigers 

 of posterior body region with small subterminal tooth (Figure 30- 

 118e) Syllis (Ehlersia) sp. A, p. 30-124 



Syllis (Ehlersia) cornuta Rathke, 1843 

 Figures 30-113, 114a-f 



Syllis cornuta Rathke, 1843:164. 



Syllis ( Ehlersia ) cornuta — Fauvel, 1923:267, fig. lOOg-i. 



Syllis cornuta — Pettibone, 1963:118, fig. 31i,j. 



Langerhansia cornuta — Imajima, 1966:256, fig. 51a-o. 



Syllis ( Langerhansia) cornuta — Day, 1967:244, fig. 12.2.s-u; 1973:29. 



Syllis ( Langerhansia ) cornuta — Gardiner, 1976:140, fig. 12o-s. 



MATERIAL EXAMINED: 

 Gulf of Mexico BLM-0CS: 



SOFLA 2E-11/80 (5 spec, USNM 75303), 20B-7/81 (4 spec, USNM 75304); 

 MAFLA 2207D-11/77 (4 spec), 2207F-11/77 (1 spec), 2422C-7/76 (2 

 spec), 2423E-7/76 (3 spec), 25281-2/78 (1 spec), 2531B-6/75 (3 

 spec), 2531-8/77 (1 spec, USNM 55827), 2534C-9/75 (1 spec); STOCS 

 2/IV-3 F/76 (1 spec, USNM 75224). 

 Supplementary Material: 



Florida--Hutchinson Island, St. Lucie County, 10.9 m, T. Perkins ID. (1 

 spec, USNM 54530). 

 DESCRIPTION: 



Length, to 21.0 mm (previously reported to 45 mm); width, to 0.8 mm 

 (previously reported to 1.2 mm). Body long, slender; complete specimens 

 with up to 115 setigers. Prostoraium triangular, with four small eyes, 

 and two minute ocular spots near base of palps (Figure 30-114a). Median 

 antenna arising near posterior border of prostomium, with 11-29 arti- 

 cles; lateral antennae with 8-20 articles. Palps long, triangular, 

 blunt anteriorly, fused basally. Dorsal tentacular cirri with 12-21 

 articles, ventral ones with 7-17 articles. Dorsal cirri with 4-32 arti- 

 cles anteriorly, 5-27 articles medially. Ventral cirri digitiform, 

 extending beyond parapodia anteriorly. Pygidium with paired, elongate 

 cirri having 22-30 articles, plus slender, fusiform inidventral cirrus. 

 Superior composite setae spiniger-like, numbering 1-2 per fascicle from 

 setiger 1, with fine serrations and minutely knobbed tips (Figure 30- 

 114b). Composite falcigers Didentate with small subterminal tooth and 

 long, fine serrations (Figure 30-114c,d). Blade-length ratios 2.6-6.6:1 

 anteriorly, 3.8-10:1 medially, about 3-8:1 posteriorly. Stout, bifid, 

 superior simple seta (Figure 30-114e) and bidentate inferior simple seta 

 (Figure 30-114f) present posteriorly. Pharynx extending to setigers 8- 

 13; middorsal tooth subterminal; margin surrounded by ten soft papillae. 

 Proventricle extending from setigers 9-14 to 12-21, with 44 (33-50) 

 muscle cell rows. Ventricle occupying two setigers. Pharynx 1-1.7 

 times longer than proventricle; proventricle 4-8 times longer than wide. 

 PREVIOUSLY REPORTED HABITAT: Intertidal to 2560 m; among serpulid 

 tubes, bryozoans, algae, the maldanid Petaloproctus socialis; on shelly 

 bottoms, mud, sand, stones, rocks, sponges; sexual forms in plankton. 



30-120 



