OF THE ‘PORCUPINE’ EXPEDITIONS. 397 
reaching even beyond the tips of the bristles. The latter are yellowish, not very nume- 
rous in either branch, and characteristic. The dorsal division bears tolerably straight 
bristles, with an unusually prolonged smooth tip (Pl. LXXI. fig. 5, and again more 
highly magnified in fig. 6). The ventral series (Pl. LX XI. fig. 7) have also a very long 
smooth termination, and a comparatively short region with spines. The bristle repre- 
sented has intermediate or average characters. ‘This form comes nearest the Hunoa 
scabra, CErst. (EZ. erstedi, Mgrn.), but it differs in the more pointed anterior lobes of the 
head, the much larger size of the eyes (which are considerable in £. wrstedi), in the 
smoothness of the cirri and palpi, in the greater length of the ventral cirri, and, lastly, 
in the characteristic structure of the bristles, which have a much longer smooth portion 
at the tip. A single loose scale with a series of minute, pointed papille in the usual 
positions, a few large conical processes, and a few cilia occurred in the bottle; but its 
ownership is of course open to question. It is much softer and smoother than that of 
E. erstedi or E. nodosa. 
LaAGiscA JEFFREYSI, n.s. Dredged in the Expedition of 1869 in the tube of a Hunice 
in 163 fathoms off the west coast of Ireland, and also in a free condition on the same 
ground (muddy sand), and in 690 fathoms on the Channel slope in 1870. It is an 
interesting species, which in superficial characters somewhat resembles Harmothoé 
imbricata, so that there is some excuse for collectors mistaking it. The same may be 
said of L. rarispina, Sars, which Dr. Malmgren saw in the bottles containing H. imbricata 
in the British Museum. It may be recognized externally by its more slender bristles 
(both dorsal and ventral), and the greater delicacy and (under a lens) minutely spinous 
nature of the scales, as well as the longer and more tapering dorsal cirri. There are 
45 segments bearing bristles; and the tail is not quite complete. 
The head of this form somewhat resembles that of Harmothoé imbricata ; but the eyes 
are decidedly larger. The tentacle is longer and less dilated below the tip; indeed the 
specimens scarcely show any dilatation. The antennz are shorter; but the palpi are 
similar, having minute papille. ‘The tentacular cirri and tentacle are covered with very 
long papille, with a slight dilatation at the tip, and thus contrast with those of 
Harmothoé imbricata, irrespective of the presence of the enlargement in the latter below 
the termination. 
The scales appear to reach the number of 14 pairs. They are rounded in front, 
somewhat reniform posteriorly, and throughout (in the spirit-preparations) of a uniform 
greyish hue. Their surface is nearly smooth to the naked eye; but under a lens the 
whole is densely covered by a series of minute, pointed, slightly brownish spines, and 
the free portion is profusely ciliated (Pl. LX XI. fig. 8). The cilia are pellucid tapering 
structures, terminating in a slightly dilated tip. A considerable part of the body pos- 
teriorly is devoid of scales. The dorsal cirri extend beyond the tip of the bristles, and 
are covered with long cilia similar to those on the scales. In both organs these are 
3H 2 
oH A 
