Long as tentacular cirri, extending slightly to well beyond tips of 

 setigerous lobes (Figures 29-20c,d). Ventral cirri beginning on setiger 

 3. Transverse ridges extending across dorsum beginning on setiger 1 oc 

 2; ridges bearing vacuoles, characteristically curved posteriorly on 

 both sides of midline (Figure 29-20c). Entire body papillose except foe 

 pal po styles and ventral surface of head. Hooked actcular notosetae 

 beginning on setiger 3, accompanied by slender notoaciculum (Figure 29- 

 20d). Neurosetae with curved tips and indistinct secondary tooth (Fig- 

 ure 29-20e— g). Shorter neurosetae serrate on one margin (Figure 2 9- 

 20g,h). Posterior end with 1-3 achaetous preanal segments, each bearing 

 dorsal and ventral cirri; pygidium (Figure 29-20i) with numerous long 

 papillae and a pair of densely papillose anal cirri. 



REMARKS: Jones (1961) described A. papillosa as lacking a median anten- 

 na; however, examination of a paratype (AM'IH 3602) revealed the presence 

 of a small median antenna. 



PREVIOUSLY HE PORTED HABITAT: Intertidal to 9 u; mud. 



GULF OF MEXICO BLM-OCS OCCURRENCE: Off Louisiana and Texii (Figure 29- 

 19); 10-27 in; clayey sand, sandy clayey silt. 

 DISTRIBUTION: Gulf of Mexico off Florida and Texas. 



Ancistrosyllis hartmanae Pettibone, 1966 



Figures 29-21, 22a-g 



Ancistrosyllis hartmanae Pettibone, 1966:172, fig. 7a-c. 



MATERIAL EXAMINED: 

 Gulf of Mexico BLM-OCS: 



SOFLA 2-11/80 (3 spec, USNM 86912), 20B-3/8I (3 spec, USNM 

 86913); MAFLA 2211G-8/77 (1 spec), 2315A-7/76 (2 spec), 2316H-L1/77 (3 

 spec, USNM 86911), 2318E-11/77 (1 spec), 2422C-6/76 (3 spec), 2423A- 

 6/76 (1 spec), 2423B-7/76 (1 spec), 24231-7/76 (1 spec), 2423J-8/77 

 (1 spec); STOCS 3/1-3 F/76 (1 spec, USNM 86914), 1/IV-4 W/76 (1 spec, 

 USNM 86915). 

 DESCRIPTION: 



Length, to 11.0 mm (previously reported to 25 ram for 110 segments); 

 width, to 0.50 mm. Largest specimen complete with 63 setigers and three 

 achaetous preanal segments. Prostomium (Figure 29-22a) with small lat- 

 eral antennae. Median antenna about half as long as lateral ones. 

 Palps with small palpostyles (Figure 29-22b). Anterior dorsal cirri 

 about equal in length to tentacular cirri, extending beyond setigerous 

 lobes (Figure 29-22a). Dorsal cirri of middle and posterior setigers 

 smaller (Figure 29-22c). Ventral cirri beginning on setiger 3. Body 

 with numerous papillae dorsally and laterally (Figure 29-22a,b); trans- 

 verse dorsal ridges absent. All appendages except palpostyles papil- 

 lose. Hooked acicular notosetae beginning on setiger 3, accompanied by 

 slender aciculum (Figure 29-22c,d). Neurosetae long (Figure 29-22e) to 

 short (Figure 29-22f), with curved tips and slender, indistinct secon- 

 dary tooth. Longer setae minutely serrate, shorter setae distinctly 

 serrate and medially expanded (Figure 29-22f). Posterior end with three 

 achaetous preanal segments; pygidium with few papillae and a pair of 

 papillose anal cirri (Figure 29-22g). 



REMARKS: The Gulf of Mexico BLM-OCS specimens match fairly well the 

 description of A. hartmanae by Pettibone (1966). One specimen (MAFLA 

 2423B-7/76) had a ventral cirrus on setiger 2 on one side only. 



29-24 



