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corners of ceplialon obtusely rounded. First pair of coxal plates somewhat 

 expanded distally; 3rd pair much broader than the 2nd, terminal edge not 

 insinuated; 4th pair in female about as deep as the corresponding segment, 

 distal edge evenly curved, infero-posteal corners very little produced. Coxal 

 plates in the adult male comparatively much smaller than in female. Eyes rather 

 small, rounded oval, placed above at the base of the rostrum within the most 

 convex part of the front, pigment light red. Antennae rather slender; the supe- 

 rior ones in female about the length of the cephalon and the first 4 segments 

 of mesosome combined, 2nd joint of the peduncle very much elongated and 

 narrow, exceeding in length the 1st, flagellum somewhat shorter than the ped- 

 uncle, and composed of about 9 articulations; those in adult male comparatively 

 more strongly built, 2nd joint of the peduncle scarcely longer than the 1st, flagel- 

 lum exceeding in length the peduncle, and having the 5 — 6 first joints thickened 

 and densely clothed with sensory bristles. Inferior antennae in female but little 

 longer than the superior, last joint of the peduncle nearly as long as the penulti- 

 mate one, both rather densely setous, flagellum about the length of the peduncle; 

 those in adult male very slender and elongated, attaining the length of the 

 whole body, peduncle nearly naked, flagellum extremely slender and filiform. 

 Anterior gnathopoda not very strong, propodos oblong oval in form, and but 

 little expanded distally, palm about the length of the hind margin, and not 

 defined below by any distinct denticle, carpal lobe comparatively small, not 

 nearly extending to the palm of the propodos, and only provided with a few 

 very short bristles. Posterior gnathopoda somewhat more elongated, propodos 

 more than twice as long as it is broad, and but slightly widening distally, 

 palm, as in the anterior pair, imperfectly defined below, carpal process 

 attenuated, and extending about to the palm of the propodos. The 4 anterior 

 pairs of pereiopoda rather slender, with the dactylus, especially of the 3rd 

 and 4th pairs, very much elongated, far longer than the propodal joint, and 

 falciform compressed Last pair of pereiopoda of the usual slender form, basal 

 joint rather broad, and having the posterior edge strongly arcuate above the 

 middle and fringed with delicate bristles, carpal joint shorter than the meral 

 one. propodal joint rather elongated. Last pair of uropoda with the rami 

 about the length of the basal part, and quite unarmed. Telson oblong oval 

 in form, tapering but little distally, tip rounded, and armed with 2 rather 

 strong denticles placed close together. Body pellucid, whitish, with a more 

 or less distinct orange coloured tinge on the back, antennae banded with orange; 

 ova in the marsupial pouch rose-colored. Length of adult female 7 mm, of 

 male about the same. 



liemarks. — The present species, established by Boeck, is easily distin- 

 guishable from those previously described by the very thin and pellucid 



