Gatty Marine Laboratory, St. Andrews. 197 
The second segment is slightly less than the others and bears 
the two tentacular cirri, which also are of moderate length. 
The third and fourth segments have feet devoid of branchie. 
The third foot has a branchial process of three divisions. 
The next branchia has more than double the number of pro- 
cesses, and they steadily increase till, at the tenth, their 
number is about twenty-six, at the twentieth twenty-nine 
(Pl. XIII. fig. 40). The last segment of the fragment, viz. 
the thirty-first, had branchiz with twenty-eight divisions. 
The upper or last divisions of the branchia are more slender, 
especially the terminal process, which is only about half the 
diameter of the average filament. The main stem of the 
branchia is once and a half the diameter of the base of the 
dorsal cirrus. The dorsal cirrus is of considerable length, 
extending beyond the tips of the branchial divisions, but its 
diameter is less than that of the branchial stem. The seti- 
gerous region (Pl. XIII. fig. 40) forms a short cone with the 
edge sloping inward and downward. 
The dorsal bristles are translucent, tapered, and curved at 
the tip, which has feebly developed wings. 
The ventral bristles are also translucent and the end of 
the shaft is slightly curved, dilated, striated, and bevelled. 
The terminal piece is of some length and its base is less 
bevelled than usual in such forms (Pl. XIII. fig. 41), so that 
with the gentle narrowing at the tip (front edge) the process 
is somewhat spindle-shaped. ‘The tip is peculiar, for after a 
notch it seems to taper away to a knife-point, a condition 
apparently due to injury. In certain views a differentiation 
into a bifid condition (extremely translucent) is clearly 
visible, the wings terminating in a delicate tapering point. 
The dorsal division of the fork is the longer and more robust. 
The great brittleness of these bristles is a feature of note, 
comparatively few being perfect, and even these seem to 
have been recently regenerated. The majority present a 
fissured imperfect tip, the hooks having been removed. In 
some the tip, from splitting, is brush-like, in others the 
fracture of the terminal piece is abrupt (below the bifid 
region) and from the fractured end extends a simple process 
of the ventral edge. 
The ventral cirrus forms a conical process projecting from 
the enlarged base (ventrally). 
The head is irregularly four-lobed by a fold in the middle 
of the palpus in front of each antero-lateral tentacle, so that 
the form may fall under the Eriphy/e of Kinberg as possessing 
tentacular cirri and a four-lobed frontal region, and thus its 
relationship to E. violacea is closer. The branchiz have two 
