simple seta (Figure 30-122f) and bidentate inferior simple seta (Figure 

 30-122g) present posteriorly. Acicula numbering four per parapodium 

 anteriorly, decreasing to two medially and one posteriorly. Pharynx 

 extending to setigers 4-13; margin surrounded by ten soft papillae; 

 middorsal tooth subterminal. Proventricle extending from setigers 5-14 

 to 7-23, with 39 (33-42) muscle cell rows. Ventricle occupying 2-4 

 setigers. Pharynx 0.8-1.4 times longer than proventricle; proventricle 

 2-5 times longer than wide. 



REMARKS: This species is newly reported from the Gulf of Mexico. 

 PREVIOUSLY REPORTED HABITAT: Littoral to 400 m; among algae, tunicates, 

 barnacles; on Sabellaria reefs; sand. 



GULF OF MEXICO BLM-OCS OCCURRENCE: Widespread in northeastern Gulf 

 (Figure 30-121); 14-168 m; coarse to fine-very fine sand, silty fine to 

 very fine sand. 

 DISTRIBUTION: Cosmopolitan. 



Syllis (Typosyllis) sp. G 



Figures 30-123, 124a-f 



MATERIAL EXAMINED: 

 Gulf of Mexico BLM-OCS: 



ST0CS 3/IV-3 F/77 (1 spec, USNM 75234). 

 Supplementary Material: 



Gulf of Mexico — Texas, East Flower Gardens, 27°59.57'N, 93°35.42'W, 93 m 

 (1 spec), 27°52.51'N, 93°58.56'W, 112 m (1 spec). 

 DESCRIPTION: 



Length, to 6.7 mm; width, to 1.2 mm. Body long, broad anteriorly, 

 slender posteriorly; complete specimens with up to 55 setigers. Prosto- 

 raium oval, with or without four minute eyes (Figure 30-124a). Median 

 antenna with 27 articles, lateral antennae with 18-24 articles. Palps 

 triangular, blunt, fused basally. Dorsal tentacular cirri with 21-28 

 articles, ventral ones with 13-16 articles. Dorsal cirri alternating in 

 length, with 18-48 articles anteriorly, 10-34 articles medially. Ven- 

 tral cirri slender, cirriform, extending slightly beyond parapodia. 

 Parapodia long and slender in medial to posterior regions. Pygidium 

 with paired cirri having 24 articles, plus short, slender, midventral 

 cirrus. Blades of composite falcigers with unequally cleft tips (Figure 

 30-124b-d), and coarse basal serrations except on inferior setae (Figure 

 30-124d). Blade-length ratios 3.1-3.3:1 anteriorly, 2.4-2.5:1 medially, 

 3:1 posteriorly. Superior simple seta slender, faintly serrate (Figure 

 30-124e), present posteriorly. Inferior simple seta slender, sinuous, 

 smooth, with cleft tip (Figure 30-124f), present posteriorly. Pharynx 

 extending to setigers 5 (when everted) to 11; middorsal tooth subtermi- 

 nal; margin smooth and surrounded by ten soft papillae. Proventricle 

 extending from setigers 6-12 to 17-23, with 48-50 muscle cell rows. 

 Ventricle occupying 1-2 setigers. Proventricle 1.1-1.3 times longer 

 than pharynx, and 3.7-4.5 times longer than wide. 



REMARKS: The unusual cleft setae of Syllis (T.) sp. G are superficially 

 similar to those of Exogonella longipedata Haitian (1965:77, pi. 10, 

 fig. b), described from 400 m depth off New England. 



GULF OF MEXICO BLM-OCS OCCURRENCE: One station off Brownsville, Texas 

 (Figure 30-123); 91 m; clayey sand. 



30-131 



