igi6.] S. Kemp : Notes on Crustacea Decapoda. 363 



The third maxillipedes reach ahnost or quite to the end of the 

 antennal scale. The combined length of the two subequal distal 

 segments is not greater than that oi the antepenultimate. The 

 latter segment bears a few small spinules at the distal end of its 

 lower margin and the exopod, when naturally flexed, reaches but 

 little beyond the middle of its length. 



The first peraeopods (text-fig. 2c) reach a little further than 

 the third maxillipedes. The merus at its outer distal angle bears 

 three stout curved spines and there is a single external spine near 

 the distal end of the carpus. The subchela is a little more than 

 three times as long as broad; the "thumb" is large and sharp as 

 in P. incisiis. The first legs are separated at their base by a large 

 forwardly directed sternal tooth. 



The second peraeopods (text- fig. 2d) are clothed with long 

 hairs and reach beyond the carpus of the first pair; the merus is 

 as long as the carpus and chela combined, the carpus is one and a 

 third times the length of the chela and the fingers are a little less 

 than one and a half times as long as the palm. Each finger bears 

 a slender spine at its apex, but the spines are not curved and the 

 claw IS apparently without cutting edges. The fixed finger is a 

 little broader than the dactylus. 



The third peraeopods reach beyond the antennal scale bj^ the 

 length of the two ultimate segments. The proportions are much 

 the same as in P. incisus, but the propodus and dactylus are com- 

 paratively a trifle longer, their combined lengths being almost three 

 quarters that of the carpus. 



The fourth and fifth pairs bear scattered setae on the propo- 

 dus. The fifth reach beyond the scale by about half the length of 

 the dactylus. The propodus in this limb is two and a half times 

 the length of the carpus and is a quarter longer than the subequal 

 merus and dactylus. Seen under a high power of the microscope 

 the anterior margins of the merus and carpus have a roughened 

 appearance, as though they were studded with small tubercles. 



The abdomen in a dried specimen shows faint indications of 

 sculpture, very shallow transverse grooves and elevations being 

 visible on the first four segments. In the posterior half of the 

 second somite and over the greater part of the third and fourth 

 there are sharp longitudinal mid-dorsal carinae. Those on the 

 second and third somites are simple, but that on the fourth is 

 longitudinally grooved in the middle and thus has the appearance 

 of a double carina fused at either end. There are two short dorsal 

 carinae on the fifth somite and a pair of similar widely-separated 

 carinae, which are exceedingly obscure, on the sixth. The pleura 

 are not pointed inferiorly. 



The pleopods of the male resemble those of P. incisus, the 

 endopod of the last four pairs is well developed and carries an 

 appendix interna. In the female, as in P. incisus and P. sculptus, 

 the endopod is greatly reduced and the appendix interna^ found in 

 those species in a rudimentary condition on the second, third and 

 fourth pairs, is entirely suppressed. 



