present posteriorly. Acicula slender, appearing trifid distally (Figure 

 30-74f), enlarged and bidentate in one specimen (Figure 30-74g). Phar- 

 ynx extending from setigers 1 to 4-7, with large, subterminal middorsal 

 tooth. Proventricle extending from setigers 5-8 to 6-12, with approx- 

 imately 17 muscle cell rows. Two specimens with gametes beginning in 

 setigers 8 and 11. 



REMARKS: Only tentative assignment of these specimens to Eusyllis can 

 be made, since the anterior pharyngeal denticulation was not observed. 

 They otherwise match published descriptions of E. lamelligera fairly 

 well. 



PREVIOUSLY REPORTED HABITAT: Gravel and shell; among bryozoans, 

 sponges, ascidians; sexual forms at surface. 



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

 73); 24-189 m; coarse to fine sand, silty fine to very fine sand, clayey 

 silt. 



DISTRIBUTION: Eastern North Pacific, Atlantic, Gulf of Mexico, Mediter- 

 ranean, English Channel. 



Genus Odontosyllis Claparede, 1863 



TYPE SPECIES: Syllis fulgurans Audouin and Milne Edwards, 1833c. 

 REFERENCES: 

 Imajima, 1966:102. 

 Day, 1967:260. 

 Fauchald, 1977a:83. 



DIAGNOSIS: Prostomium with three antennae; palps basally fused or 

 separate. Nuchal organs as large, curved, ciliated ridges along poste- 

 rior border of prostomium. Occipital flap often present. Two pairs of 

 tentacular cirri. Antennae, tentacular and dorsal cirri smooth. Phar- 

 ynx armed with ventral arc of recurved teeth. 



Key to the Gulf of Mexico BLM-OCS Species of Odontosyllis 



la. Antennae, tentacular and dorsal cirri short, generally not exceed- 

 ing body width (Figure 30-76a); pharynx with ventral arc of six 



teeth and two pointed lateral plates (Figure 30-76g) 



Odontosyllis enopla, p. 30-80 



lb. Median antenna, dorsal tentacular cirri and most anterior dorsal 

 cirri long, exceeding body width; pharynx with ventral arc of five 

 or seven teeth, with or without pointed lateral plates 2 



2a. Pharynx with ventral arc of seven teeth, middle teeth longest, 



plus two pointed lateral plates (Figure 30-78e) 



Odontosyllis cf. octodentata, p. 30-85 



2b. Pharynx with ventral arc of five teeth, similar in size, without 



pointed lateral plates (Figure 30-80e) 



Odontosyllis sp. A, p. 30-85 



Odontosyllis enopla Verrill, 1900 

 Figures 30-75, 76a-g 



Odontosyllis enopla — Verrill, 1900:627. 



30-80 



