POLYCH.IJTA. — BENHAM. 197 



rays are more sharply pointed, suggesting that those of the 

 larger are worn down. The low tubercles behind the areola 

 have a rounded attachment, and are terminally dilated and 

 produced into three or more, rarely four, sharp spines. 



The impression conveyed by a close study of the series is 

 that the larger are derived from the smaller by increase in 

 number of rays or spines. 



The branahial papulae are much less developed than in the 

 other species (PI. xxxix., fig. 37). On all the feet, within the 

 branchial region of the body, there is a couple of short 

 papulae close together on the anterior face, the distal being 

 somewhat the larger. 



On the posterior face of the cirriferous feet there is a single 

 short papula springing from the cushion, but this is absent 

 in the elytriferous feet. 



The chseta has a construction just below the " frilled " 

 region. Avhich does not occur in the other species (PI. xxxix., 

 fig. 36). 



The head. — The prostomium is as broad as its length, 

 perhaps rather broader ; the tentacles are broken. 



But a characteristic feature about the eyes is their ap- 

 proximation (PL xl., figs. 39, 40). The two on each side 

 are in contact, near the hinder part of the side. When seen 

 from above only one pair appears to exist, but from the 

 side an anterior eye is seen lower down the side, and rather 

 smaller than the posterior. It may be that it is the anterior 

 eye that has travelled backwards, if one may judge from 

 the relative size of the eyes. 



The double elytral '" pads '" extend on to the 15th segment. 



hoc. — Off Gabo Island, Victoria, 200 fathoms, with Polynoe 

 platycirrus and Physalidonotus laevis. 



Genus Harmothoe {sensu latu), Kinherg.^ 



Hakmothoe (Eunoa) etheridgei, sp. nov. 



(Plate xl., figs. 43-51.) 



A single individual whose body is of the usual shape, the 

 sides almost parallel, and nearly equally tapering at each 



1. Malmgren's genera, as has been pointed out by others, are founded 

 on sufh pomts as the relative size of the notopodium, the presence or 

 absence of a tooth on the neuropodial chaeta, and the presence or absence 

 of a fringe to the elytra. It is well knOAvn that these features all occur in 

 various species of Lepidonotus, yet no one, 1 think, has attempted to sub- 

 divide that genus on these minute differences. Hence I follow Willey 

 ("Southern Cross" Polychaeta, 1902, p. 263) among others, in using 

 Harmothoe, rather in Kinberg's sense, though it is not easy to distinguish 

 that from his Antinoe. 



