of Edinburgh, Session 1881 - 82 . 
685 
Pleon having the segments furnished with a slight central keel 
dorsally ; the epimera of the first segment not produced downwards, 
those of the four following segments, greatly produced downwards 
triangularly, and gradually attenuating, end in sharp spine-like 
points, the anterior margins of the epimera of the second segment 
furnished with a single acute anteally directed spine ; epimera of 
the sixth segment with two small spine-like points, one directed 
downwards, the other backwards over the insertion of the outer 
uropods ; telson quadrate, the extremity truncated, bearing two 
divergent ridges which terminate at the distant corners in spine-like 
points ; uropods gently rounded at their extremities, each with two 
raised ridges, one central, the other running along the outer margin 
and terminating in strong spines ; there is also a spine on the upper 
surface of the basal joint. 
Eyes minute, and apparently devoid of lenses, of a pink colour, 
lying close together and touching each other, being situated directly 
under the rostrum, by which they are entirely concealed, and resting 
on the upper antennae. 
Upper antennae, which are furnished with two flagella as in allied 
genera, have the first and third joint subequal in length, and the 
middle joint about half their length ; the flagella are about half as 
long again as the peduncle. 
Lower antennae are, in the specimen procured, imperfect, but 
the peduncle is short, equal in length to that of the upper antennae ; 
green gland with a conspicuous opening on the under side of the 
basal joint. 
Chelipeds densely setose ; with rounded joints, which present no 
appearance of angularity; the meros, which is the largest joint, does 
not quite reach the extremity of the rostrum ; it bears a single spine 
at the extremity of the upper and outer margin, and another on the 
under surface ; carpus furnished with three spines on the inner and 
one on the outer margin, and one on the under surface ; hand 
unarmed, elongate, ovate, finger and thumb acute, with crenated 
inner margin, their tips crossing when closed. 
The two following pairs of feet chelate, their coxae furnished on the 
inner margin with large lobes, that of the third pair having a hook- 
shaped process on the outer side of the extremity of this lobe. 
First pair of pleopods elongate, spatulate, porrected between the 
