Crustacea malacostraca. iv. 



Second pair of maxillipeds (figs. 7 c — 7 d) somewhat similar to that in P. armata, but the interesting 

 terminal joint shows some differences. As in that species this joint has two proximal teeth and three more 

 slender, subspiniform processes, but the two teeth are considerably broader, oblong-triangular, and the prox- 

 imal tooth is shorter than in P. armata, while the distal tooth has a secondary small tooth on its distal margin ; 

 the first of the processes is longer than the proximal tooth and marked off by a suture ; the second process 

 is short, considerably curved, and a seta originates at its base; the terminal process is rather curved and 

 only somewhat longer than the first. Third pair of maxillipeds (fig. 7 e) in the main as in P. armata, differ 

 especially in having no teeth on the inner or outer margin of second to fifth joint excepting a tooth on the outer 

 margin of the carpus ; the merus has on the outer margin somewhat from the end a kind of tubular process (t) 

 which might be taken as the basal part of a broken seta, but the aspect of its wall is different, and on the 

 same spot I have found a similar tube in the male of the next species. First pair of legs (Fig. 7 f) nearly as 

 in P. armata ; the carpus is almost as long as the merus. Second pair of legs (figs. 7 g and 7 h) with merus, 

 carpus and propodus somewhat robust ; carpus not half as long again as merus, and at the end of its inner 

 margin with a conical process (fig. 7 h) directed vertically inwards ; dactylus not quite twice as long as the 

 carpus. -- Uropods (fig. 7 i) of moderate length; the peduncle about as long as the two posterior abdominal 

 segments combined, somewhat less than twice as long as the endopod, which has 3 spines on its inner margin 

 (the terminal spines on both rami lost). 



Length of the specimen with the marsupium half developed 5.5 mm. 



Adult Male. Carapace from above (fig. 7 1) very oblong-ovate, about three-fourths as long again 

 as broad ; considerably behind the middle a pair of small spines somewhat removed from one another, but 

 the protuberances bearing in the female these spines have almost disappeared in the male. Seen from the side 

 (fig. 7 k), the carapace is a good deal lower than in the female; pseudorostrum is turned considerably upwards, 

 but its front margin is angular at the middle, as its upper half is subvertical, its lower half directed not only 

 downwards but besides a little forwards. The ocular lobe is linear, much longer than in the female, though 

 shorter than in the male P. armata. On the right side of the carapace the specimen to hand has three out- 

 standing teeth on the posterior part of the lower margin. First and second free segment each with the dorsal 

 median bifid lamella as in the female; the three posterior segments each with some dorsal small teeth and 

 granules, and besides the lateral margins of all segments are irregularly adorned with a few teeth or sometimes 

 only a single tooth. The granulation on the dorsal side of the abdominal segments very fine. — The uropods 

 (fig. 7 m) longer than in the female; the peduncle which is only a little longer than the two posterior ab- 

 dominal segments together and considerably less than twice as long as the endopod, has on the inner edge 

 a good number of thin setae, short and rather close together on the proximal half, and then gradually more 

 distant and increasing strongly in length ; the endopod has 8 spines on the inner margin and a long apical spine. 



Length 5.7 mm. 



Remarks. This species is allied and rather similar to P. armata, but is instantly distinguished 

 in having a pair of spines somewhat from one another on the upper side of the carapace rather behind its 

 middle, and in the female each of these spines is placed on the top of a large, broad, conical protuberance, 

 which is rudimentary in the male. Third maxillipeds have no teeth on the inner margin of second to fifth 



