of the Fishery Board for Scotland. 151 
very small, but the remaining three are about equal in length and taper 
slightly to the distal end. ‘The antennules are also sparingly setiferous, 
and carry several stout and elongated sensory filaments. 
The antenne are composed of four joints, the first two are large and 
somewhat dilated, but the third and fourth are narrow—the third being 
also very short; the end joint is furnished at the apex with a stout, 
strongly-hooked claw and several spiniform sete (fig. 18). 
The mandibles and maxille resemble very closely the same appendages 
in Lichomolgus fucicolus, G. S. Brady. The mandible is small, with a 
dilated base, and carries two stout, moderately long, and strongly curved 
apical appendages and two small basal sete. The maxille are small and 
digitiform, and at the apex furnished with two slender spiniform set 
(fig. 19). 
ae maxillipeds very small, and each armed with a stout, strongly- 
curved, and moderately elongate terminal claw (fig. 20). 
The first feet were damaged, and the inner branches are not figured. 
The outer branches are three-jointed ; the first joint is short and bears a 
sabre-like spine on the outer distal angle, but no setz on the inner 
margin. The second joint, which is also short, carries a sabre-like spine 
on the outer distal angle and a moderately long seta on the inner margin. 
The third joint, which is longer and narrower than those preceding, is 
furnished with three short sabre-like spines on the outer margin, and a 
similar but rather longer one at the apex. There are also four moderately 
long plumose setz on the inn2r margin (fig. 21), 
The second pair have the outer branches very similar to those of the 
first pair in structure and armature, except that the third joints have five 
setee on the inner edge. The first and second joints of the inner branches 
have no spines or sete on the outer margins, but the third joint is provided 
with a short spine near the distal end of the outer edge, and with two that 
are longer but of about equal length at the apex. ‘The first joint has one 
seta on the inner margin, the second two, and the third three. The end 
joint is also considerably longer than the first or second (fig. 22). 
In the third pair, the first and second joints of the outer branches are 
similar in structure and armature to the same joints in the second pair ; 
the third joints are armed with two sabre-like spines on the outer margin, 
and with two similar terminal spines; there is also a row of five plumose 
setze on the inner margin. The inner branches are provided with one seta 
on the inner edge of the first joint, and two on the inner edge of the 
second and third joints. The third joint bears also three moderately long 
sabre-like spines on its truncate apex, but there are no spines or sete on 
the inner margins (fig. 23), 
In the fourth pair, the inner branches seem to be entirely obsolete, 
for on either foot there is no appearance of the endopodites having been 
broken off. 
The onter branches are normal and their armature is very similar to 
that of the outer branches of the third pair (fig. 24). 
The fifth pair are rudimentary, and consist each of a minute digitiform 
process bearing two small hairs, as shown in fig. 16. 
No form that could be regarded as the female of this species has yet 
been observed. 
