DESCRIPTION: 



Length, 3.1+ mm (previously reported to 4.39 mm); width, 0.4 mm (previ- 

 ously reported to 0.39 mm). Body short, relatively broad, nearly com- 

 plete with 37 setigers. Prostomium oval, with four small, lentigerous 

 eyes, and two ocular spots (Figure 30-142a). Antennae, tentacular and 

 dorsal cirri all short, stout. Median and lateral antennae each with 

 eight articles. Palps short, bluntly triangular, fused basally. Dorsal 

 tentacular cirri with ten articles, ventral ones with 5-6 articles. 

 Dorsal cirri with 7-13 articles anteriorly, 6-9 articles medially. 

 Ventral cirri short, ovoid. Anterior composite falcigers bidentate with 

 pointed teeth and short, fine serrations (Figure 30-142b). Composite 

 falcigers from medial and posterior regions broad and narrow, all with 

 similar blade-length (Figure 30-142c,d). Blade-length ratios 1.8:1 

 anteriorly, 1.1:1 medially. Superior simple seta slender, minutely 

 bidentate (Figure 30-142e); inferior simple seta stout, distinctly bi- 

 dentate (Figure 30-142f). Acicula slender, numbering two per parapodium 

 anteriorly, becoming solitary and enlarged medially, with obliquely 

 acuminate tips (Figure 30-142g). Pharynx extending to setiger 6; margin 

 smooth; raiddorsal tooth subterminal. Proventricle located in setigers 

 7-9, with 30 muscle cell rows. Ventricle occupying one setiger. Pro- 

 ventricle same length as pharynx and 2.4 times longer than wide. 

 REMARKS: This species was previously known only from the Red Sea and 

 Gulf of Elat. It was originally identified as S. prolifera in BLM-MAFLA 

 collections. 



PREVIOUSLY REPORTED HABITAT: Intertidal to 5 m; on vermetid reefs, 

 coral. 



GULF OF MEXICO BLM-OCS OCCURRENCE: One station near Florida Middle 

 Ground coral reef (Figure 30-141); 38 m; silty fine sand. 

 DISTRIBUTION: Red Sea, Gulf of Elat, Gulf of Mexico. 



Syllis (Typosyllis) sp. B 



Figures 30-143, 144a-g 



MATERIAL EXAMINED: 

 Gulf of Mexico BLM-OCS: 



S0FLA 20E-11/80 (5 spec, USNM 75309); MAFLA 2207H-8/77 (1 spec), 

 2211H-7/76 (2 spec), 22111-11/77 (1 spec), 2211J-11/77 (1 spec), 

 2315A-8/76 (1 spec), 2528G-6/75 (1 spec, USNM 65693); ST0CS HR1-2 7/76 

 (1 spec, USNM 75229). 

 DESCRIPTION: 



Length, to 8.9 mm; width, to 0.5 mm. Body slender, fairly small, com- 

 plete specimens with up to 67 setigers. Prostomium rounded to trilobed 

 anteriorly, with four lentigerous eyes (Figure 30-144a), and two ocular 

 spots near base of palps; eyes and ocular spots sometimes absent. Medi- 

 an antenna arising between posterior eyes, with 13-23 articles; lateral 

 antennae with 8-14 articles. Palps triangular, fused basally. Dorsal 

 tentacular cirri with 10-19 articles, ventral ones with 8-11 articles. 

 Dorsal cirri mostly shorter than body width, alternating slightly in 

 length, with 5-22 articles anteriorly, 4-21 articles medially. Ventral 

 cirri digitiform, sometimes extending beyond parapodia anteriorly. 

 Pygidium with paired cirri having 6-20 articles, plus short midventral 

 cirrus. Composite falcigers slender, bidentate, with short serrations 

 and rounded teeth (Figure 30-144b-e). Blade-length ratios 1.5-2.1:1 

 anteriorly and medially, 1.4-1.9:1 posteriorly. Superior simple seta 



30-148 



