OF THE ‘PORCUPINE’ EXPEDITIONS. 407 
inferior, with long delicate bifid tips. All are very delicate and translucent, and 
the basal region of the terminal process is often wrinkled. The appearance of the 
bristles varies (as usual) with their position. The ventral cirrus extends nearly as far as 
the tip of the fleshy part of the foot. 
EUSTHENELAIS HIBERNICA, n. s. Dredged in 106 fathoms in 1862, on Station 8, off 
the west coast of Ireland, and in 45 fathoms off Cape Sagres in 1870. 
The form is allied to Leanira, but distinguished by having the inferior group of the 
ventral bristles bifid. 
The head is eyeless in the spirit-preparations. Tentacle rather longer than the ten- 
tacular cirri, and with two minute processes at the base. Palpi of the usual elongated 
form, with a scoop-like sheath at the base; the peduncle of the tentacular cirrus bears 
four processes besides the bristles. The tentacular cirrus proper is external (dorsally), 
and somewhat less than the tentacle: A smaller process lies within, its filiform 
tip being shorter than the former. Beneath are two processes—an inner, short 
and somewhat blunt, with the tip extending a little beyond the peduncle, and 
another slender subulate process nearly half the length of the tentacular cirrus. 
The long slender bristles are directed forward and inward. All the scales are 
absent. 
The dorsal lobe of the foot has long papillee at the tip, and finely serrated bristles, of 
the usual character (a series more distinctly, another more minutely spinous); the inferior 
division carries also long papille, slightly diminished at the tip. The superior ventral 
bristles have rather slender shafts, and the distal ends are furnished with from six to nine 
whorls of spikes. The tips are long jointed processes ending in a capillary termination— 
resembling those of Sthenelais or Sigalion rather than Leanira, since the necklace-like 
canaliculi are absent (Pl. LX XIII. fig. 4, the figure representing one of those next the 
superior lobe of the foot); the serratures on the tip of the shaft are more numerous in 
this kind, but the jointed extremities are much shorter. The segmentation of the tip is 
faint and widely distant. The basal segment is fully one third the length of the process. 
In the stouter bristles below, the ends of the shafts are smooth, and the divisions of 
the terminal process shorter. The slender group at the ventral border have a slightly 
enlarged tip, obscurely bifid (Pl. LX XIII. fig. 5). The character of these bristles also 
leans to the two forms previously mentioned, and not to Leanira. A few of the inferior 
group of ventral bristles present one or two spines at the end of the shaft. The dorsal 
cirrus (branchia?) is short anteriorly, but gradually increases in length till about the 
middle of the body. There is a single large ciliated pad on the dorsal edge of the foot, 
and about three smaller pads in the curve below the cirrus. The ventral cirrus is long 
and subulate, reaching almost to the tip of the foot; as usual, it is longest on the first 
foot. 
