OF THE ‘PORCUPINE’ EXPEDITIONS. 390) 
The species is roughly distinguished from E. impar by the deep brownish hue of the 
dorsum, by the minute and rather indistinct eyes and the brownish purple proboscis, by 
the structure of the tips of the ventral bristles and their greater delicacy, and by the 
longer and more delicate dorsal bristles, which give the observer quite a different im- 
pression, though somewhat difficult to describe in words. 
The head has the same form as in E. impar, and is pale throughout, no pigment 
occurring at the base of the tentacle. ‘The eyes appear only as minute black points; 
two lie at the posterior border of the head, almost hidden by the collar; two (of the 
same minute size) are situated to the front and outside these, as in the ordinary species. 
The tentacle is absent; antenne pale and filiform; palpi pale with filiform tips; 
tentacular cirri absent. A single reniform scale occurred in the vessel. It had long 
clavate papille on the usual surface and border, thinly distributed. ‘The dorsal 
cirrus has a filiform tip without enlargement, and rather long clavate papille, sparsely 
distributed. ‘The ventral cirrus has alsoa filiform tip, slightly enlarged (probably from 
the spirit) at the end, and with short clavate papille. It reaches considerably beyond 
the base of the lowest bristles. 
The dorsal branch of the foot bears bristles of a similar character to those of E. im- 
par, but they are on the whole longer and more slender, with better-marked spinous 
rows. The smooth portion at the tip, again, is decidedly shorter than in the common 
species. The tip, moreover, shows a characteristic conformation in some cases, having 
a slight mucro at the termination, then a shallow notch, and another elevation or faint 
mucro a little above the first row of spikes. One of the stronger bristles is represented 
in P]. LXXT. fig. 13. <A long clear shaft projects beyond the fleshy part of the foot 
before the rows of spikes appear; so that the bristles are comparatively long. ‘The 
tendency to differentiation of the tip is observed in fig. 14 (from another strong 
bristle). The superior edge of the ventral series has a few with tips so attenuate 
that it is difficult to make out their structure; the bifid condition, however, ap- 
pears to be present. The next lower series have much longer and stronger tips; 
and though the extremity is extremely delicate and translucent, the bifid condition is 
apparent. The terminal hook is short, and very slightly curved; and the secondary 
process is rather short and broad, and passes far up. ‘The rows of spines are distant and 
well marked. The tips of the succeeding (lower) bristles become broader and shorter ; but 
the character of the termination remains the same. All are very translucent and deli- 
eate. Toward the inferior edge the tip is simple, only a faintly developed hook being 
present. One of the elongated forms near the dorsal edge of the fascicle is shown in 
P]. LXXI. fig. 15. Thé arrangement of the spines and the short bifid tip are character- 
istic. Fig. 16 represents a bristle from the middle of the foot; it is exceedingly trans- 
lucent and very faintly serrated. A more highly magnified tip, corresponding to each 
kind, is given in fig. 17 (corresponding to fig. 15) and in fig. 18 (corresponding to fig. 16). 
It is curious that in both examples of the species the proboscis is extruded. From 
