1916.] S. Kemp: Notes on Crustacea Decapoda. 359 
The corneal portion of the eye is reniform in outline. The 
basal segment of the antennular peduncle (text-fig. Ia) is longitud- 
inally keeled below and usually bears a small tooth near its prox- 
imal end. Its lateral process is transversely oblong with the outer 
distal angle somewhat drawn out and projecting forwards. The 
second and third segments of the peduncle are extremely short, 
the two combined being scarcely half the length of the first. 
The antennal scale (text-fig. 1b) is broadest near the base 
and is narrowed strongly towards the apex. It is about three times 
as long as broad and the short spine which terminates its outer 
margin extends by almost its whole length beyond the apex of 
the lamella. On the outer margin, at the end of the proximal 
quarter is a single stout tooth, recalling that found in P. sculptus, 
but placed much nearer the base. The margin behind this tooth 
is strongly convex and that in front of it slightly concave. 
The outer maxillipedes reach beyond the tip of the antennal 
scale by almost the entire length of the ultimate segment. 
The first peraeopods (text-fig. 1c) are a little shorter than 
the outer maxillipedes and do not possess exopods. ‘The spine 
on the outer margin of the merus is strong and, as in P. sculptus, 
is terminal in position. On the distal margin of the carpus there 
are two external spines. The propodus is nearly three and a half 
times as long as wide and the ‘‘thumb” of the subchela is ex- 
ceptionally large and strong. At their base the first peraeopods 
are separated, in both sexes, by a sharp forwardly directed sternal 
tooth. 
The second peraeopods (text fig. rd) are clothed with long 
hairs and reach beyond the end of the carpus of the first pair by 
almost the entire length of the chela. The carpus is about one 
fifth shorter than the merus and nearly one fifth longer than the 
chela. The chela, as in allied species, is weakly constructed, without 
incurved claws at the apex. The fingers are of equal breadth and 
length and the palm is exceptionally short, occupying only about 
one fifth the length of the chela. 
The slender third peraeopods reach beyond the tip of the 
antennal scale by the two terminal segments and by one third the 
length of the carpus. The latter segment is nearly one and a half 
times the length of the merus, twice the length of the ischium and 
one and a half times the length of the propodus and dactylus 
combined. The propodus is equal in length with the ischium and 
is two and a half times as long as the dactylus. 
In the last two peraeopods, which are similar, the four distal 
segments are practically glabrous; those of the fourth pair reach 
beyond the antennal scale by the length of the dactylus. The merus 
in this pair is a trifle longer than the dactylus, four fifths the 
length of the propodus and nearly twice as long as the carpus. 
The dactylus is almost three quarters the length of the propodus. 
The abdominal segments are deeply grooved and incised, much 
as in P. sculptus, the depressed portions being pubescent and the 
raised portions glabrous. On the first five somites the sculpture is 
