7/76 (1 spec, USNM 90627), 2422F-7/76 (1 spec, USNM 90626), 2423G-7/76 

 (1 spec), 2423J-7/76 (2 spec), 2424C-7/76 (2 spec). 

 Supplementary Material: 



F lor lda--Hutchinson Island, St. Lucie County, T. Perkins ID. (1 para- 

 type, USNM 60460). 

 DESCRIPTION: 



Length, 3.9+ mm (previously reported to 5.0 mm); width, 0.3 mm. Body 

 long, slender; all specimens incomplete with up to 37 setigers. Prosto- 

 mium oval to cordate, with or without four lentigerous eyes, and two 

 ocular spots at base of palps (Figure 30-64a). Antennae long, smooth, 

 with short cirrophores. Palps thick, fused basally. Nuchal organs as 

 paired lobes between prostomium and peristomium. Tentacular cirri long, 

 slender. Dorsal cirri alternating long and short, filiform or digiti- 

 forra, respectively, as follows: long on setigers 1, 4, 6, 8, and all odd 

 numbered setigers from 9; short on setigers 3, 5, 7 and all even num- 

 bered setigers from 10; absent on setiger 2. Ventral cirri arising near 

 tips of parapodia. Anal cirri paired, long, filiform. Ciliary tufts 

 present on prostomium, pygidium, and all parapodia. Superior simple 

 seta tapering to slender tip (Figure 30-64b), present from setiger 1. 

 Composite falcigers all with short, bidentate blades (Figure 30-64c,d), 

 numbering three per parapodium; shaft-heads homogomph, with each prong 

 bifid. Pharynx usually extending to setiger 4; with subterminal dorsal 

 tooth; margin surrounded by ten papillae. Proventricle extending from 

 setigers 4-6 to 5-7, with about 14 muscle cell rows. Gametes starting 

 in setigers 3-10. 



REMARKS: P. gesae is newly reported from the Gulf of Mexico. Identifi- 

 cations of this species were confused with several other species in BLM- 

 MAFLA collections. 



PREVIOUSLY REPORTED HABITAT: 7-11 ra; calcareous sand. 



GULF OF MEXICO BLM-0CS OCCURRENCE: Common in northeastern Gulf (Figure 

 30-63); 10-180 m; coarse to fine-very fine sand, silty fine to very fine 

 sand, clayey sandy silt. 

 DISTRIBUTION: East coast of Florida, Gulf of Mexico. 



Pionosyllis sp. A 

 Figures 30-65, 66a-f 



MATERIAL EXAMINED: 

 Gulf of Mexico BLM-OCS: 



SOFLA 22C-11/80 (1 spec, USNM 89888), 25C-7/81 (3 spec, USNM 89889); 

 MAFLA 2211G-8/77 (2 spec), 2315A-2/78 (1 spec, USNM 65683), 2528E- 

 11/77 (2 spec). 

 DESCRIPTION: 



Length, to 10 mm; width, 0.6 mm. Body long, thread-like; complete 

 specimens with up to 45 setigers. Prostomium rounded, without eyes. 

 Palps long, separate, straight or directed ventrally. Nuchal organs as 

 paired ridges between prostomium and peristomium. Antennae, tentacular 

 and dorsal cirri long, filiform, with short cirrophores (Figure 30-66a). 

 Ventral cirri slender, digitiform t<-> iliform, sometimes longer than 

 parapodia. Superior simple seta straight, distally blunt and serrate 

 (Figure 30-66b); first present in anterior or midbody region. Composite 

 falcigers with bidentate blad^c having numerous long serrations (Figure 

 30-66c-e), blade-length r.-. io 4-3:1- Inferior simple seta strongly 

 bidentate, with several long subap- guards (Figure 30-66f), present 



30-72 



