BATHYAL POLYNOIDS — PETTIBONE 



9 



sheaths attached basally on tentacular segment, wider basally, tapermg 

 distally, as long as tentacular cirri and may partially encircle the 

 palps. A bulbous facial tubercle between bases of palps, continuous 

 with a longitudinal ridge on upper lip. Second or buccal segment 

 (figs. 36, d) with first pau- elytrophores; parapodia rudimentary, not 

 elongated, with no to- and neuroacicular achaetous lobes; ventral or 

 buccal cbri with inflated cirrophores and long styles; a lamellar 

 papilla on ventral base of parapodium; ventral lip (fig. 36) inflated, 

 longitudinally grooved, with 11 lamellar papillae in three irregular 

 rows. Setigerous parapodia elongated from third segment on. 

 Lamellar papillae at ventral parapodial bases of segments 2 and 3; 



'"'.0.3' 



'V,, 



Figure 4. — Bathyadmetella commando, new species: a, cirrigerous parapodium, posterior 

 view, style of dorsal cirrus missing; h, elytragerous parapodium, anterior view, elytron 

 missing, position of acicula shown in dotted lines; c, tips of neurosetae. (dT = dorsal 

 tubercle, neP = nephridial papilla, vC = ventral cirrus.) 



ventral cu-ri on these 2 segments extra long, extending beyond the 

 distal tips of the neuropodia (fig. 36). Rest of ventral cirri short, 

 subulate, in middle of elongated neuropodia (figs. 4a, 6) . 



Parapodia (figs. 4a,6) elongated, subbu-amous. Notopodia small 

 lobes on anterodorsal faces of neuropodia, inflated basaUy, tapering 

 to short digitiform acicular lobes, enclosing the slender tips of the 

 notoacicula; notosetae lacking. Neuropodia flattened transversely, 

 inflated subdistally, postsetal lobes subtriangular, presetal lobes with 

 elongate acicular processes containing the nem'oacicula. Neurosetae 

 munerous, forming brushlike transparent bundles. Neurosetae with 

 long, bare, basal regions, distaUy wider, flattened, with somewhat 



