present by setiger 7. Superior composite falcigers with long, finely 

 serrate, minutely bidentate blades (Figure 30-30c), numbering 2-3 per 

 fascicle. Medial and inferior composite falcigers numerous on anterior 

 parapodia, similar to superior falcigers but with shorter blades (Figure 

 30-30d). Inferior simple seta bidentate (Figure 30-30e), present on far 

 posterior setigers. Pharynx extending to setiger 5, dorsal tooth sub- 

 terminal. Proventricle located in setigers 5-6, with about 15 rows of 

 muscle cells. 



REMARKS: This species is somewhat similar to Exogone longicirris 

 (Webster and Benedict, 1887:722, pi. 3, figs. 46-50; Perkins, 1981:1092, 

 fig. 5a-f ). Exogone sp. A differs from E. longicirris in having longer 

 antennae, distally pointed superior simple setae with several aristae, 

 and falcigers with longer, serrate blades. 



GULF OF MEXICO BLM-OCS OCCURRENCE: Several stations in northeastern 

 Gulf (Figure 30-29); 37-106 m; coarse to medium sand, silty very fine 

 sand. 



Exogone sp. B 



Figures 30-31, 32a-e 



MATERIAL EXAMINED: 

 Gulf of Mexico BLM-OCS: 



S0FLA 22-11/80 (3 spec, USNM 75291), 24B-8/81 (3 spec, USNM 75292), 

 28D-11/80 (1 spec, USNM 75293); MAFLA 2211G-8/77 (1 spec). 

 DESCRIPTION: 



Length, to 4.2 mm; width, to 0.2 mm. Body small, slender, preserved 

 specimens brown in color; complete specimens with up to 44 setigers. 

 Prostomium broader than long, with four eyes, variable in size; ocular 

 spots present or absent. Median antenna fusiform, 2-5 times as long as 

 prostomium; lateral antennae smaller, ovoid. Palps thick, blunt, fused 

 (Figure 30-32a). Tentacular, dorsal, and ventral cirri ovoid. Dorsal 

 cirri absent on setiger 2. Anal cirri paired, long, cirriform. Supe- 

 rior simple seta distally blunt and serrate (Figure 30-32b), present 

 from setiger 1. Superior composite spinigers long-bladed with knobbed 

 tips and numerous coarse serrations (Figure 30-32c), blades becoming 

 progressively shorter posteriorly; one per fascicle. Composite falci- 

 gers with short, unidentate or subbidentate, coarsely serrate blades 

 (Figure 30-32d). Inferior simple seta distally pointed and lightly 

 serrate (Figure 30-32e), present on far posterior setigers. Pharynx 

 extending to setigers 5-7. Proventricle extending from setigers 6-8 to 

 8-9, with 19-22 rows of muscle cells. Gametes observed in setigers 13- 

 34. 



REMARKS: This species is similar to Exogone atlantica ; it differs from 

 the latter in having a longer median antenna and more strongly serrate 

 superior simple setae. 



GULF OF MEXICO BLM-OCS OCCURRENCE: Several stations off central and 

 southwestern Florida (Figure 30-31); 43 m; coarse to fine sand. 



Exogone lourei Berkeley and Berkeley, 1938 

 Figures 30-33, 34a-f 



Exogone lourei Berkeley and Berkeley, 1938a:44, figs. 6-12. 

 Exogone lourei — Banse, 1972a:200, fig. 5A-D. 



3 0-39 



