I 1 



as the 6 th somite; it is armed with 3 pairs of side spines, subterminal spinules at the tip, the 

 lono-est, of moderate length, measuring about one-sixth the length of the telson. In younger 

 specimens the 6 th somite is almost twice as long as the 5 111 and the telson appears relatively a 

 little shorter, so in the youngest male the 5 th and the 6 th somite and the telson are respectively 

 14 mm., 2,6 mm. and 3,5 mm. long. Telson a little shorter than the inner uropods, that are 

 slightly shorter than the outer. 



Eyes (Fig. 29^) of moderate size, transverse diameter as long or slightly longer than 

 axial ; ocellus large, elliptical, at its anterior extremity in contact with the cornea. 



Antennular peduncle reaching to the middle of the antennal scale, 2 nd and 3" 1 joint sub- 

 equal, together shorter than basal article; stylocerite acuminate, reaching to the middle 

 of 2 nd article. Antennular flagella subequal, reaching beyond the rostrum as far as the 

 latter is long. 



Antennal scale (Fig. 29^) nearly one-fifth shorter than the carapace, measuring 6,5 mm. 

 in an egg-bearing female, the carapace of which is 8 mm. long; the scale is 4,4-times as long 

 as wide and narrows distinctly anteriorly, being at the base of the terminal spine little more 

 than half as broad as at the greatest width • tip of terminal spine in line with the rounded end 

 of the lamella. Antennal peduncle almost as long as that of the upper antennae. 



External maxillipeds furnished with a well-developed exopodite and projecting by two-fitths 

 their terminal joint beyond the antennal scale. Legs of the i st pair as long as the external maxil- 

 lipeds, terminal joint (propodus) (Fig. 29*/, 2ge) measuring nearly two-thirds the penultimate and 

 with a minute chela at the end, that measures 1 / u the length of the joint. The legs of the 

 2 nd pair are very unequal, the left leg being the longer and more slender one. The left leg 

 (Fig. 29/) reaches by the chela, the multiarticulate carpus and one-sixth of the merus beyond the 

 antennal scale, the right only by the chela and one-fourth of the carpus ; the fingers of the very 

 small chela of the left leg are as long as the palm and, as in Pies. öinoculus, the merus and the 

 anterior half of the ischium are also distinctly annulate; the fingers of the larger chela of the 

 right leg are shorter, measuring only two-thirds the length of the palm and the merus shows also 

 an annulation, which, however, is rather indistinct. The legs of the 3 rd pair reach by the dactyli 

 and four-fifths of the propodi beyond the antennal scale, the following diminish slightly in length, so 

 that the legs of the 5 th pair exceed the scale only by the dactylus and one-third of the propodus. 

 The propodi of the three posterior legs are one and a half as long as the carpi ; the dactyli 

 (Fig. 29^) are short, measuring hardly more than one-fifth of the propodi; they are of a 

 stout shape, only 5-times as long as broad at base and provided along the proximal 

 half of their posterior margin with 4 or 5 spinules that gradually increase in 

 length, the distal longest one measuring one-sixth the length of the dactylus. All the peraeopods, 

 except the last pair, are furnished with well-developed epipodites. 



Eggs numerous, small, 0,4 — 0,5 mm. long. Length of ova-bearing female 52 or 53 mm. 



Pies. rostricrcsicntis (Bate) from the Kei-islands differs by its much larger size, by the 

 frontal crest being more strongly curved and more depressed, so that the rostrum presents a 

 characteristic crescentic shape, by the circular form of the ocellus and by the stylocerite reaching 

 to the distal extremity of the antennular peduncle. 



