Gatty Marine Laboratory^ St. Andrews. 259 



tion in the ordinary Nereids. No eyes are visible. The 

 tentacular cirri are proportionally slender, and the lon.^est is 

 the dorsal of the first pair, not the dorsal of the second pair, 

 as in the ordinary Nereids. The probosei* is armed with a 

 pair of amber-coloured jaws, having slender points and about 

 eleven teeth (Malmgren). No paragnathi are present, but 

 the basal segment of the organ in extrusion has a series of 

 conical papillse ranged entirely round the distal region, and, 

 as Malmgren points out, not in a uniform line. 



The first foot has a tapering dorsal cirrus, which extends 

 beyond the other parts. The dorsal lobe is little developed. 

 The setigerous region ends in a conical papilla behind that 

 for the spine, and bears a single brown spine and a series o-f 

 homogomph bristles, the terminal process of which has a 

 dilatation with longer spines near the base. The ventral lobe 

 is a short conical process. The ventral cirrus is of consider- 

 able size, and only one appears to be present on this foot ; 

 indeed, the specimen did not show the double cirrus till the 

 fifth or sixth foot, but this may have been due to injury. 



The third foot has the prominent conical ceratophore (of the 

 long subulate dorsal cirrus), with a broad base to the inner 

 side of the dorsal lobe, which is subulate. An upper seti- 

 gerous lobe appears on this foot, with a small brown spine 

 and a small tuft of bristles. The inferior setigerous lobe has 

 its terminal papilla ])Osteriorly and two considerable tufts of 

 bristles. The ventral lobe is conical with a large basa) 

 region. 



All the bristles (PI. VI. fig. 4) have the same structure, 

 namely, a cylindrical translucent shaft with very regularly 

 arranged camerse and a dilated distal end, which does not taper 

 to a point inferiorly, but forms a rounded cup-shaped out- 

 line. The terminal piece is curved, dilated at the base, where 

 the spines on the edge are longer, and tapers to a fine point ; 

 the inferior articulating process is comparatively short, leav- 

 ing a portion of the socket free. 



The fourth and fifth feet appear to have only a single 

 ventral cirrus, which is placed close to the body, a long; 

 interval occurring between it and the ventral lobe. The sixth 

 foot has two ventral cirri. The great proportional size of 

 the bristles in such a foot is a feature, and they have a 

 peculiar pale golden sheen. The upper spine is the smaller, 

 and the bristles pass off in two bundles above and below it. 

 The inferior spine likewise divides the bristles of its lobe into 

 two divisions, both of which are larger than in the upper 

 groups; the only differentiation of these bristles is that the 

 dorsal are more slender and have the longest and most delicate 

 terminal pieces, whilst the ventral have stronger shafts, 



