blades of superior falcigers with coarse basal serrations; blade-length 



ratio 5:1. Inferior simple seta slender, minutely bidentate, present on 



last setiger only. Pharynx short, extending to setiger 2. Proventricle 



located in setigers 2-5, with about 42 muscle cell rows. 



REMARKS: Syllides sp. A is similar to S. japonicus Imajima (1966:112; 



Banse, 1971:1477) in having superior setal blades with basal spines and 



in having a blade-length ratio of 5:1. It differs from the latter in 



lacking eyes and in having superior simple setae with blunt tips, rather 



than fine, drawn-out tips. 



GULF OF MEXICO BLM-OCS OCCURRENCE: One station off Panama City, Florida 



(Figure 30-43); 52 m; coarse sand. 



Genus Streptosyllis Webster and Benedict, 1884 



TYPE SPECIES: Streptosyllis arenae Webster and Benedict, 1884. 



REFERENCES: 



Pettibone, 1963:126. 



Fauchald, 1977a:84. 



DIAGNOSIS: Prostoraium with three antennae. Tentacular segment often 



collar-like and ciliated, with two pairs of tentacular cirri. Dorsal 



cirri smooth, wrinkled, or articled. Anterior parapodia with large, 



knobbed acicula and modified setae. Composite spinigerous setae and 



capillary superior simple setae absent. Pharynx unarmed. 



Streptosyllis pettiboneae Perkins, 1981 

 Figures 30-45, 46a-h' 



Streptosyllis pettiboneae Perkins, 1981:1143, figs. 27a-f, 28a-i. 



MATERIAL EXAMINED: 

 Gulf of Mexico BLM-OCS: 



SOFLA 2D-5/81 (1 spec); MAFLA 2102J-11/77 (3 spec), 2102H-2/78 (3 

 spec, USNM 65687), 2318G-8/76 (1 spec), 2318K-8/76 (1 spec), 2318D- 

 11/77 (1 spec), 231311-11/77 (1 spec), 2424C-7/76 (1 spec), 2856E-8/77 

 (4 spec). 



Supplementary Material: 



Florida — Hutchinson Island, St. Lucie County, T. Perkins ID., 6.7 m 

 (FSBC I 23649, 1 paratype), 10.9 m (FSBC I 23651, 1 paratype). 

 DESCRIPTION: 



Length, to 4.0 mm (previously reported to 4.0 ram); width, to 0.5 mm 

 (previously reported to 0.9 mm without parapodia). Body slender, 

 thread-like; complete specimens with up to 41 setigers. Prostomium 

 trapezoidal with four lentigerous eyes across posterior part, and usual- 

 ly two ocular spots near anterior margin (Figure 30-46a). Antennae 

 fusiform, about 1.5-2 times as long as prostoraium. Palps biarticulate 

 with flattened basal lobes and short, filiform, terminal lobes; arising 

 ventrally, terminal lobes sometimes visible dorsally. Nuchal organs as 

 small lobes between prostomium and peristomium. Tentacular segment 

 inflated, collar-like, often pigmented, with ciliary band; tentacular 

 cirri digitiform, or long and fusiform. Anterior dorsal cirri long, 

 slender; dorsal cirri of setiger 6 and several other setigers (7, 13, 

 and 15 in one specimen) with enlarged, f. ■jmented articles. Ventral 

 cirri appearing tr iart iculate, extai well beyond parapodia. 



30-52 



