Nereimyra sp. B 



Figures 28-21, 22a-d 



MATERIAL EXAMINED: 

 Gulf of Mexico BLM-OCS: 

 MAFLA 2315A-2/78 (1 spec). 

 DESCRIPTION: 



Length, 4.2+ mm; width, 0.7 mm. Body slender, incomplete with 24 seti- 

 gers. Prostomium rectangular with four lentigerous eyes in rectangular 

 arrangement; posterior margins prolonged as nuchal organs (Figure 28- 

 22a). Antennae missing. Palps with stout, fairly long bases, styles 

 missing. Tentacular and dorsal cirri long, distinctly articled distal- 

 ly. First tentacular segment not visible dorsally. Notopodia reduced 

 to two slender acicula supporting dorsal cirrophores, setae absent. 

 Neuropodia well-developed with conical acicular lobe, lip-like postsetal 

 lobe, and smaller, rounded presetal lobe (Figure 28-22b). Ventral cirri 

 slender, digitiform to tapered. Neurosetae with long extension of 

 shaft-head bifid; blades minutely serrate, with subapical spine or 

 sheath; lateral sheaths apparently absent. Upper neurosetae minutely 

 bidentate. Middle and lower neurosetae unidentate anteriorly (Figure 

 28-22c), gradually becoming bidentate (Figure 28-22d). Blades of neuro- 

 setae without basal spur or lateral sheath. Middle neurosetae with 

 longest blades; blade length ratio 3.1:1. Pharynx extending to setiger 

 6, jaws absent. 



REMARKS: This specimen differs from Nereimyra sp. A in having eyes and 

 smaller neuropodial presetal lobes, and in lacking the basal spur and 

 lateral sheath on the blades of the neurosetae. 



GULF OF MEXICO BLM-OCS OCCURRENCE: Single record off west-central 

 Florida (Figure 28-21); 38 m; silty fine sand. 



Genus Hesiospina Imajima and Hartman, 1964 



TYPE SPECIES: Kefersteinia similis Hessle, 1925. 



REFERENCES: 



Imajima and Hartman, 1964:80. 



Fauchald, 1977a:76. 



DIAGNOSIS: Prostomium with two antennae and two biarticulate palps. 



Eight pairs of tentacular cirri. Parapodia subbiramous; notopodia 



small, with falcate spines. Neuropodia with composite falcigers and 



single acicular spine. Pharynx with marginal papillae, jaws absent. 



Hesiospina sp. A 



Figures 28-23, 24a-e 



MATERIAL EXAMINED: 

 Gulf of Mexico BLM-OCS: 



SOFLA 4A-7/81 (4 spec, USNM 75321), 16E-11/80 (1 spec, USNM 75322); 

 MAFLA 21041-2/78 (1 spec), 2211G-7/76 (13 spec, USNM 71780), 22111- 

 7/76 (9 spec), 2211J-7/76 (5 spec), 2748G-2/78 (1 spec). 

 DESCRIPTION: 



Length, 5.6+ mm; width, to 1.4 mm. Body usually fragmented near ante- 

 rior end; all specimens incomplete with up to 20 setigers. Prostomium 

 rectangular with two pairs of fairly large, lentigerous eyes, anterior 



28-25 



