of prostomium. Tentacular and dorsal cirri indistinctly articled. Par- 

 apodia biramous from setiger 2, with small, triangular notopodial lobe 

 below dorsal cirrophore (Figure 28-32b). Neuropodia with low, rounded 

 presetal lobes and longer, triangular or truncate postsetal lobes. 

 Ventral cirri tapered, extending well past tips of neuropodia. Notose- 

 tae including several stout, blunt-tipped, cross-striated, coarsely 

 spiked setae (Figure 28-32c); few blunt-tipped serrate setae (Figure 28- 

 32d); and single, stout acicular spines (Figure 28-32e). Neuropodial 

 falcigers with long extension of shaft-head entire; blades faintly 

 serrate, with minutely hooked tip and subapical spine (Figure 28-32f), 

 blade-length ratio 3.3-3.6:1. Pharynx extending to setigers 4-5. 

 REMARKS: Amphiduros sp. B differs from Amphiduros sp. A in lacking the 

 fine-tipped, spiked notosetae and slender, hair-like notosetae. 

 GULF OF MEXICO BLM-OCS OCCURRENCE: Two records off northwestern Florida 

 (Figure 28-31); moderately shallow, 37-38 m; coarse sand, silty fine 

 sand. 



Genus Hesione Savigny, 1818 



TYPE SPECIES: Hesione splendida Savigny, 1818. 



REFERENCES: 



Izuka, 1912:192. 



Fauvel, 1923:233. 



Fauchald, 1977a:76. 



DIAGNOSIS: Prostomium with two small lateral antennae; palps and median 



antenna absent. Eight pairs of tentacular cirri. Parapodia subbira- 



raous, notosetae absent. Pharynx with smooth margin, jaws absent. Body 



relatively large, robust, with relatively few segments. 



Hesione ?picta F. Miiller, 1858 

 Figures 28-33, 34a-c 



Hesione picta F. Miiller, 1858:213, pi. 6, fig. 3. 

 Hesione picta — Hart man, 1951a:35. 

 Hesione picta — Jones, 1962:180 [synonymy]. 

 Hesione picta — Fauchald, 1977b:16. 



MATERIAL EXAMINED: 

 Gulf of Mexico BLM-OCS: 



SOFLA 16F-11/80 (1 spec, USNM 75320); MAFLA 2104E-2/78 (1 spec), 

 22111-8/77 (1 spec). 

 DESCRIPTION: 



Length, to 14.5 mm (previously reported to 50 mm); width, to 2.0 mm. 

 Body stout, with 16 setigers and one achaetous preanal segment; without 

 color markings. Prostomium oval, with mid-posterior notch, two antero- 

 lateral prolongations, and two pairs of moderately large, lentigerous 

 eyes (Figure 28-34a). Lateral antennae minute. Tentacular and dorsal 

 cirri long, smooth, filiform. Parapodia subbiramous, notopodia reduced 

 to two slender acicula supporting dorsal cirrophores, neuropodia well- 

 developed, distally truncate, with slender presetal lobes (Figure 28- 

 34b). Ventral cirri filiform, extending past tips of neuropodia. Neu- 

 rosetae as numerous composite falcigers with long extension of shaft- 

 head entire; blades minutely serrate, bidentate, with spine below 



28-36 



