wide. One Florida specimen (FSBC I 20684) with sexual stolon of 28 



setigers. 



PREVIOUSLY REPORTED HABITAT: To 11 m; coarse calcareous sand. 



GULF OF MEXICO BLM-OCS OCCURRENCE: Two stations off Florida (Figure 30- 



87); 29-43 m; coarse sand. 



DISTRIBUTION: Mediterranean Sea, eastern North Atlantic, Florida, Gulf 



of Mexico, Solomon Islands. 



Trypanosyllis sp. C 



Figures 30-89, 90a-c 



MATERIAL EXAMINED: 

 Gulf of Mexico BLM-OCS: 



MAFLA 2207F-11/77 (1 spec), 2423B-7/76 (1 spec, USNM 65698). 

 DESCRIPTION: 



Length, to 4.8 mm; width, to 0.4 mm. Body long, narrow, slightly flat- 

 tened, uncolored in preservative; one specimen complete with 74 seti- 

 gers. Prostomium square, with four lentigerous eyes (Figure 30-90a). 

 Antennae arising near anterior margin of prostomium; median antenna 

 broken, lateral antennae with eight articles. Palps separated, shorter 

 than prostomium. Dorsal tentacular cirri with 9-13 articles, ventral 

 ones with 7-8 articles. Dorsal cirri inflated distally, with 7-11 

 articles anteriorly, 5-8 articles in midbody region. Ventral cirri 

 auricular, often extending beyond parapodia. Anal cirri paired, with 

 seven articles. Composite falcigers with finely serrate, bidentate 

 blades (Figure 30-90b,c); superior blades slightly longer than inferior 

 ones anteriorly, becoming similar in length posteriorly. Simple setae 

 not observed. Acicula thick, emergent, numbering 1-2 per parapodium. 

 Pharynx extending to setigers 10-11; trepan not observed. Proventricle 

 extending from setigers 11-12 to 13-14, with 15-16 muscle cell rows. 

 Pharynx 2.6-3 times longer than proventricle; proventricle about twice 

 longer than wide. 



REMARKS: Trypanosyllis sp. C is unusual in having a relatively narrow, 

 nearly cylindrical body. For this reason, BLM-MAFLA specimens were 

 originally confused with other genera. 



GULF OF MEXICO BLM-OCS OCCURRENCE: Two stations off Florida (Figure 30- 

 89); 19 m; fine-very fine sand, silty fine sand. 



Genus Xenosyllis Marion and Bobretzky, 187 5 



TYPE SPECIES: Syllis scabra Ehlers, 1864. 

 REFERENCES: 

 Fauvel, 1923:272. 

 Laubier, 1968:90. 

 Fauchald, 1977a:84. 



DIAGNOSIS: Prostomium with three antennae and basally separated palps. 

 Nuchal organs as large, curved ridges along posterior border of prosto- 

 mium. Two pairs of tentacular cirri. Antennae, tentacular and dorsal 

 cirri with moniliform or collared articles. Dorsum covered with small 

 papillae or ridges. Pharynx unarmed. 



30-95 



