30 



first; the propod is not broadened, but the finger is very 

 long, slightly curved, and when flexed reaches back as far as 

 the basal portion of the carpus, forming apparently an efiicient 

 grasping organ. The fourth leg (fig. 9) is slightly longer 

 than the third with the joints more slender, and it is not sub- 

 chelate but simple, the finger not longer than the propod. 

 This appendage is the same in both male and female, although 

 in some other species of Pkreatoicus the legs of the fourth 

 pair are modified in the male to form a special grasping organ. 

 The fifth, sixth, and seventh pairs are quite similar, increasing 

 progressively in length posteriorly. The basal joint in each 

 is very greatly expanded behind into a rounded lobe pro- 

 jecting backwards and downwards, reaching two-thirds of 

 the way to the distal end of the ischium. This expansion 

 is marked off from the joint proper by a distinct ridge running 

 parallel to the anterior margin; the posterior margin of the 

 lobe is entire and bears no setae; the ischium is distinctly 

 longer than the merus and, like it, broadened somewhat 

 distally; the carpus and propod are cylindrical; the finger is 

 straight, acute; these joints show setae of varying sizes, as 

 indicated in the figure (fig. 10). 



The male appendages (fig. 11) on the seventh peraeon 

 segment are slender, tapering, curved inwards towards one 

 another, slightly swollen at the base, and apparently grooved 

 on the posterior surface. 



The pleopods show a close general resemblance to those 

 of P. australis. The first pleopod has the basal joint or 

 protopod short, the endopod and exopod subequal, each form- 

 ing an irregular oval lobe, the margin of the endopod being 

 smooth and without setae, as in all the pleopods, the outer 

 margin and apex of the exopod being fringed with fine setae. 

 The second pleopod in the male (fig. 13) has the basal joint 

 broader and bearing a few long setae at its inner margin ; 

 the endopod is similar to that of the first pleopod, but bears 

 on the inner side the penial appendage, which is four-fifths 

 as long as the exopod, broadened near the base and apparently 

 grooved on its upper or anterior surface; the exopod is larger 

 than the endopod and consists of two joints, the basal one 

 about as long as the endopod and produced at its outer 

 proximal angle into a broad rounded lobe ; the terminal 

 joint is small, oval, and has its margins fringed with long 

 setae, a few long setae being also present on the distal portion 

 of the outer margin of the basal joint. The third (fig. 14), 

 fourth, and fifth pleopods are similar to the second, except 

 for the absence of the penial appendage, and they all bear 

 attached to the outer margin of the basal joint a large 



