igi6.J S. Kemp : Notes on Crustacea Decapoda. 359 



The corneal portion of the eye is reniform in outUne. The 

 basal segment of the antennular peduncle (text-fig. la) 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. ih) 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. ic) are a little shorter than 

 ihe 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. id) 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 tour 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 



