posteriorly. Pharynx extending to setigers 4-6. Proventricle extending 

 from setigers 4-7 to 6-9, with about 20-38 muscle cell rows. 

 REMARKS: Identifications of this species were confused with several 

 other species in BLM-MAFLA collections. 



GULF OF MEXICO BLM-OCS OCCURRENCE: Scattered records off Florida (Fig- 

 ure 30-65); 24-54 m; coarse to fine sand, silty fine sand, silty clay. 



Pionosyllis sp. C 



Figures 30-67, 68a-b' 



MATERIAL EXAMINED: 



Gulf of Mexico BLM-OCS: 



MAFLA 2211E-7/76 (1 spec, USNM 89887). 



DESCRIPTION: 



Length, 1.6+ mm; width, 0.8 mm. Body stout, strongly arched dorsally, 



only specimen incomplete. Prostomium oval with four large, lentigerous 



eyes, and two ocular spots near anterior margin (Figure 30-68a). Palps 



directed ventrally, barely visible dorsally. Nuchal organs as large, 



curved ridges along posterior border of prostomium. All antennae, 



tentacular and dorsal cirri lost. Ventral cirri subulate, extending 



beyond parapodia, especially long on setiger 1. Composite falcigers 



with coarsely serrate, strongly bidentate blades having subterminal 



guards (Figure 30-68b,b'); blade-length ratio about 2.3:1. Pharynx 



colored dark brown, extending to setiger 11, with smooth margin and 



middorsal tooth located in anterior third. Proventricle located in 



setigers 12-16, with about 27 muscle cell rows. 



REMARKS: See '"REMARKS" under Pionosyllis sp. D below. Specimens (not 



included herein) from the Florida Middle Ground coral reef have long 



antennae, tentacular and dorsal cirri. 



GULF OF MEXICO BLM-OCS OCCURRENCE: One station off central Florida 



(Figure 30-67); 43 m; coarse sand. 



Pionosyllis sp. D 



Figures 30-69, 70a-c 



MATERIAL EXAMINED: 

 Gulf of Mexico BLM-OCS: 



S0FLA 16C-7/81 (1 spec, USNM 89885); ST0CS 6/II-1 W/77 (3 spec, USNM 

 89886; 1 spec, USNM 65664). 

 DESCRIPTION: 



Length, 4.8+ mm; width, to 1.0 mm. Body stout, strongly arched dorsal- 

 ly; all specimens incomplete with up to 26 setigers. Prostomium oval, 

 with four moderately large, lentigerous eyes (Figure 30-70a); ocular 

 spots present or absent. Palps thin, paddle-shaped, usually directed 

 ventrally. Nuchal organs as large, curved ridges along posterior border 

 of prostomium. Antennae, tentacular and dorsal cirri much longer than 

 body width, slender, indistinctly articled distally. Ventral cirri 

 tapered, extending beyond parapodia on all setigers. Composite falci- 

 gers numerous, with long, finely serrate, bidentate blades (Figure 30- 

 70b, c); blade-length ratio 2.4-3.4:1. Pharynx extending to setigers 7- 

 9, with smooth margin surrounded by ten papillae, and subterminal raid- 

 dorsal tooth. Proventricle extending from setigers 8-10 to 13-16, with 



30-75 



