lU 



antennse a small rostriform projection, lateral corners drawn out to large 

 somewhat detlexed liiiguiform lobes. Anterior coxal plates rather large, in 

 female folly twice as deep as the bod^', in male somewhat less deep ; 4th 

 pair in female considerably expanded in their inferior part and angularly 

 produced below the deep posterior emargination; 5th pair quadrangular, about 

 as deep as broad, with the posterior edge slightly concaved. Last pair of 

 epimeral plates of metasome not at all produced at the latei-al corners. Eyes 

 oval, somewhat larger in male, pigment reddish with an opaque white coat- 

 ing. Superior antennte in female scarcely longer than the cephalon and the 

 1st segment of mesosome combined ; 1st joint of the peduncle very large, com- 

 pressed, carinated dorsally and jutting out at the end anteriorly as an ob- 

 tusely acuminated projection advancing over the succeeding joint, which forms 

 a similar but much smaller projection; flagellura nuich shorter than the 

 peduncle and composed of but 7 articulations, the 1st of which equals in 

 length the 2 succeeding ones combined; accessory appendage quite wanting. 

 Same antenuBe in male a little larger than in female, with the 2nd peduncu- 

 lar joint scarcely produced anteriorh-, flagellum 9-articulate, with the 1st 

 joint very large and densely clothed with sensitive bristles. Inferior antennae 

 in female considerablv shorter than the superior, penultimate joint of the 

 jjeduncle much larger tlian the ultimate one and slightly jjroduc'ed at the 

 end anteriorly, flagellum very short and 4-articulate. Epistomal plate very 

 large, nearly rectangular. Anterior gnathopoda with the basal joint about 

 the length of the i-emainder part of the leg, projioddS shorter than the carpus 

 and not at all expanded distally. Posterior gnatliopoda extremely slender; 

 propodos exceeding the half length of the carpus, oblong triangular, with 

 two transverse rows of strong setse near the base of the dactjdus. Posterior 

 pereiopoda rather robust, l^asal joint of the 3rd pair I'ounded, that of the 2 

 succeeding ones irregularly oval, constricted near the end; meral joint in all 

 rather expanded and finely ciliated on the posterior edge. Last pair of uro- 

 poda in female with the rami nearly linear in form, the outer somewhat 

 longer than the inner and without an3' trace of marginal bristles; those of 

 male lanceolate and considerably exjjanded at the base. Telson exceedingly 

 narrow and elongate, nearly 3 times as long as broad at the base, gradually 

 tapering to the conical tiji; cleft very narrow, fissure-like, and extending far 

 beyond the midtUe. Colour a chalky white, each segment having dorsally a 

 small orange-coloured patch, more expanded in male. Length of female 7 

 mm., of male 8 mm. 



Jtemarlcs. — This is a very pretty and easily recognizable firm, tliough 

 one whicli shows considerable differences in the two sexes, a fact that 

 indeed lias led Sp. Eati; to describe the species under two diff'erent names. 



