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THE VOYAGE OF H.M.S. CHALLENGER. 
of each (papilla) being a bluntly conical process, to which a filiform extremity is attached. 
The smooth dorsal cirri have a well-marked blackish belt a little below the pale extremity. 
The ventral cirrus is short and slightly tapered. It does not reach the bases of the 
bristles. The ventral papilla is somewhat clavate, its nearest ally in this respect being 
Lepidonotus clava. 
There are eighteen pairs of blackish-grey ovoid scales (PI. XVII. fig. 2), variegated 
with a white patch over the surface of attachment, a somewhat pale external border (a 
continuation of the pale anterior covered portion), and a series of very distinct tubercles 
which resemble pustules. The posterior scales are considerably smaller, but the isolated 
tubercles are larger. In vertical section the thick dorsal cuticle of the scales is peculiarly 
wTinkled or facetted, a feature probably due to the tuberculated condition. On the 
external border of the scale are a series of small conical papillae, about three appearing 
in each transverse section just within the tip. 
The bristles of the dorsal division of the foot are very slightly developed, forming a 
small tuft projecting outward at the tip of the strong spine. The bristles (PL IXa. fig. 6) 
have stout basal portions and very finely attenuated tips, with well-marked rows of 
spines, somewhat like those of Polynoe platycirrus. The shorter forms possess blunt 
extremities, but even more boldly marked spinous rows. 
The ventral series consist of pale straw-coloured bristles, characterised by very short 
extremities. The shaft (PI. IXa. fig. 7) dilates gradually from the insertion towards the 
tip, which presents the stout appearance of such as Lepidonotiis squamatus, but further has 
beneath the terminal hook a very characteristic secondary process and ridge ; while the 
spinous rows are largely developed. The nerve-area is small, the ovoid cords placed 
close together in section, and with a median space beneath. The cuticle is very dense. 
In the intestine of the smaller example was a little whitish debris which contained 
fragments of Eadiolaria, minute Crustacea, and a large series of the dorsal palese and 
bristles of a Chrysopetalum, or a form allied to Bliawania myrialepis, Schmarda. 
This form closely approaches Lepidonotus. Dr. Baird’s Lepidonotus ocidatus^ from 
the Australian seas, presents a pustular condition of the anterior scales, but the organ in 
the preparations is pale, with the exception of a black spot over the surface of attachment, 
and the structure of both dorsal and ventral bristles materially diverges. The latter are 
simple, not bifid at the tip. 
Polynoe {Lepidonotus) iphionoides, n. sp. (PI. X. figs. 1, 2; PL Xa. figs. 1, 2). 
Habitat. — A single example was procured by the trawl at Station 201 (in Basilian 
Strait off the Philippine Islands), October 26, 1874; lat. 7° 3' N., long. 121° 48' E. ; 
depth, 82 fathoms ; surface temperature, 83°'0 ; stones and gravel. 
1 Journ. Linn. Soc. Lond., vol. viii. p. 184. 
