OP 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 (PI. LXXI. fig. 5, and again more 

 highly magnified in fig. 6). The ventral series (PI. LXXI. 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 Eunoa 

 scabra, Girst. {E. cerstedi, Mgrn.), but it differs in the more pointed anterior lobes of the 

 head, the much larger size of the eyes (which are considerable in E. cerstedi), 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 papillse 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. cerstedi or E. nodosa. 



Lagisca jeffeeysi, n. s. Dredged in the Expedition of 1869 in the tube of a Eunice 

 in 16.3 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 Harmotho'e 

 imbricata, so that there is some excuse for collectors mistaking it. The same may be 

 said of i. raris])ina, Sars, which Dr. Malmgren saw in the bottles containing i7. 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 Harmotho'e 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 antennae are shorter ; but the palpi are 

 similar, having minute papillae. The tentacular cirri and tentacle are covered with very 

 long papillse, with a slight dilatation at the tip, and thus contrast with those of 

 Harmotho'e imbricata, irrespective of the presence of the enlargement in the latter below 

 the termination. 



The scales appear to reach the number of 14 paii's. 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 (PI. LXXI. 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 



3h2 



