GULF OF MEXICO BLM-OCS OCCURRENCE: Off Florida and Texas (Figure 29-9); 

 81-189 ra; medium to fine sand, silty very fine sand, clayey and sandy 

 silt. 



Ancistrosyllis sp. B 



Figures 29-11, 12a-e 



MATERIAL EXAMINED: 

 Gulf of Mexico BLM-OCS: 



IXTOC S49-6 12/80 (1 spec, USNM 86930). 

 DESCRIPTION: 



Length, 15+ mm; width, to 2.5 mm. Only specimen incomplete with 38 

 setigers. Prostomium (Figure 29-12a) with three antennae; lateral an- 

 tennae longer than median one. Palps with large, globular palpostyles 

 (Figure 29-12b). Dorsal and ventral pairs of tentacular cirri equal in 

 length. Dorsal cirri of setiger 1 similar in length to following ones 

 (Figure 29-12a), filiform throughout, longer than ventral cirri (Figure 

 29-12c). Body with few largs papillae dorsally, smaller papillae on 

 antennae and cirri; smooth ventrally except palpostyles and palps (Fig- 

 ure 29-12b). Hooked acicular notosetae beginning on setiger 6, accom- 

 panied by two slender acicula (Figure 29-12c). Neurosetae with bifid 

 tips (Figure 29-12d,e). 



REMARKS: Ancistrosyllis sp. B is similar to A. groenlandica Mcintosh, 

 1879, and A. commensalis Gardiner, 1976, but differs from both in having 

 large globular palpostyles. 



GULF OF MEXICO BLM-OCS OCCURRENCE: One station off Texas (Figure 29- 

 11); 25 m; silty clay to clayey silt. 



Ancistrosyllis carolinensis Gardiner, 1976 

 Figures 29-13, 14a-f 



Ancistrosyllis carolinensis Gardiner, 1976:124, fig. 9p-r. 



MATERIAL EXAMINED: 

 Gulf of Mexico BLM-OCS: 



MAFLA 22111-8/77 (1 spec, USNM 86909), 2423C-7/76 (1 spec, USNM 

 86910). 



Supplementary Material: 



North Carolina — Cape Lookout (USNM 52905, holotype). 

 DESCRIPTION: 



Length, to 9.0 mm (previously reported to 75 mm); width, to 0.45 mm 

 (previously reported to 3.0 mm). Largest specimen complete with 62 

 setigers and two achaetous preanal segments. Prostomium (Figure 29-14a) 

 with small lateral antennae; median antenna absent. Palps with small 

 palpostyles (Figure 29-14b). Dorsal tentacular cirri similar in length 

 to dorsal cirri of setiger 1; ventral tentacular cirri smaller (Figure 

 29-14a,b). Dorsal cirri of setiger 1 slightly longer than those of 

 subsequent setigers (Figure 29-14a). Parapodia (Figure 29-14c) with 

 short, globular, distinctly papillose dorsal cirri; neuropodia short, 

 rounded. Ventral cirri beginning on setiger 2. Body sparsely papil- 

 lose; papillae more numerous dorsally on palps, prostomium, and cirri; 

 few papillae on segments and parapodia. Hooked acicular notosetae 

 (Figure 29-14a,c) present from setiger 6, accompanied by slender 



29-17 



