508 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 10 



Throughout the anterior, inflated region the relation of parts is about the 

 same except that the parapodia of the fourth segment are the largest. 

 After the fifth the body is narrow and parapodia somewhat smaller. A 

 small papillar ventral cirrus, from the outer basal edge of the neuro- 

 podium, is present from the sixth, and by the seventh setigerous segment 

 it resembles those farther back. 



Throughout the body, after the seventh segment, parapodia are on 

 lateral glandular ridges, with neuropodia laterally prolonged (pi. 63, 

 fig. 3). After the ninth or tenth segment the notopodial setae are finer, 

 less noticeable and they come to be more or less eclipsed by the increas- 

 ingly larger notoaciculum which comes to form a strong, projecting, 

 straight spine that is conspicuous in posterior segments. Neuropodial 

 bases come to be proportionately longer but the relation of parts varies 

 little except that the number of setae increases in the middle region and 

 decreases farther back. Throughout the neurosetae are long, slender, 

 simple, and somewhat geniculate; they have a cylindrical stalk, and a 

 slightly expanded blade that is provided with many transverse rows of 

 slender teeth (pi. 63, figs. 5, 6, 7). The long, slender teeth are con- 

 tinued distally to the pointed tip but they are short and blunt near the 

 base (pi. 63, fig. 4). (Figures 4, 5 and 6 on Plate 63 are made from the 

 same seta to the same scale.) Furcate setae are totally lacking. There 

 are no branchiae or other parapodial lobes modified for respiration. 



The small lobe arising from the distal, ventral edge of the neuro- 

 podium, regarded as a ventral cirrus (see also Fauvel, 1932 and Monro, 

 1936, p. 193) may not be homologous to the ventral cirrus in other 

 genera since it differs from others in position and is not separated from 

 the parapodium near its base. 



Nephridial pores can be distinguished on one of the larger individuals 

 in which eggs are somewhat developed. The pores are located on the 

 ventral side of the neuropodial base; they are visible as opaque rounded 

 areas but their number or distribution cannot be accurately ascertained, 

 perhaps because of immaturity of the specimens. 



The posterior end tapers gradually through the last 10 to 15 segments 

 and terminates in a broad plaque that is cupped on the ventral side ; it is 

 about as long as broad. Its margin is entire save for a pair of short, cir- 

 ruslike processes at the sides and a similar, though slightly larger one 

 midventrally, located on the inner side of the concavity (pi. 63, fig. 2). 

 In one individual this median process is abnormally bifurcated. The dor- 



