76 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 7 



Psammolyce myops, new species 

 Plate 21, Figs. 255-264 



Collection. — 639-37. One specimen. 



Length about 45 mm; number of segments 110 or over. A single 

 specimen in 2 pieces, includes anterior and posterior ends but is some- 

 what macerated ; the last few segments are short, crowded, and termi- 

 nate in a pair of cirriform anal cirri that are about 3 times as long as 

 the anal ring is wide. Surface is pale, encrusted with white sand and 

 shell particles. Dorsum broadly exposed by the elytra but covered over 

 with sand particles, as are also the median halves of the elytra. 



Prostomium with median, club-shaped, humped, ceratophore (pi. 

 21, fig. 261) and slender style. Eyes 4, the larger, ventral pair elon- 

 gate, rectangular, in an anterior-posterior direction. Dorsal eyes much 

 smaller, elongate, on the side of the base of the median ceratophore (pi. 

 21, fig. 260). 



Elytra much as in P. fimbriata (see above), the lobes ornamented 

 with numerous soft papillae, the margins and surface with elongate 

 fringes (pi. 21, fig. 255). 



Parapodia with short, papillar notopodia, and robust, truncate 

 neuropodia, the neuroacicular lobe only slightly (pi. 21, fig. 259) or 

 not at all projecting beyond the main body of the lobe except in a few 

 anterior parapodia (pi. 21, fig. 259). Notopodial setae are fine, numer- 

 ous, and extend distally almost as far as the neuropodial setae. The 

 neuropodia have stouter superior and median setae, and finer, slenderer, 

 inferior setae. The superiormost setae are mostly entire distally but a 

 few are bifid ; the median setae have a shorter, stouter appendage than 

 the dorsalmost, and the tip is entire (pi. 21, fig. 262) or bifid (pi. 21, 

 fig. 263). The inferior setae are slenderer and the appendage longer 

 (pi. 21, fig. 264). The first few segments, posterior to the first, include 

 neuropodial setae with entire (pi. 21, fig. 258) or bifid (pi. 21, fig. 

 257) tips, and the shaft is more or less strongly serrated. 



This unique specimen resembles P. fimbriata (see above) but differs 

 in that (1) the neuropodia are more distinctly truncate, (2) the an- 

 terior eyes are narrow, elongate in a dorsoventral direction, the pos- 

 terior eyes are smaller patches on the antennal base (pi. 21, fig. 261), 

 (3) the composite neuropodial setae have shafts which are smooth save 

 in the first few segments. The appendages are proportionately shorter 

 and stouter than are those in P. fimbriata. 



Holotype. — AHF no. 16. 



Distribution. — Espiritu Santo Island, Gulf of California. 3-5 fms. 



