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end (loif^ally to oljtiise projections, the jjosterior of wliieli is compressed gibbous 

 in shape. Cephalon rather small, notneai-ly attaining the length of the first 

 2 segments of mesosome combined, rostral projection not very large, lateral 

 corners forming arounded lobe distinctly emarginated at the tip, postantennal 

 ones but little produced. Coxal plates rapidly increasing in size to the 4th pair 

 and not exhibiting any projection at the infero-posteal corners; 1st pair rather 

 small, with the anterior corner angularly produced: 4th pair nearly twice as deep 

 as the corresponding segment, and narrowly truncated at the tip, posterior edge 

 below the eraargination rather oblique; the 2 succeeding pairs Avith the 

 posterior lobe much deeper than the anterior. Last pair of epimeral plates 

 of metasome very slightlj' produced at the lateral corners. Eyes rather 

 lai'ge, oblong reniform, pigment dark red. Superior antennae somewhat exceeding 

 half the length of the body, 1st joint of the peduncle rather large, exceeding 

 in length the other 2 combined, and somewhat produced at the end anteriorly, 

 flagellum about 3 times as long as the peduncle, and composed of numerous 

 articulations, the 1st of which is rather elongated. Inferior antennae scarcely 

 more than half as long as the superior, last joint of the peduncle exceeding in 

 length the penultimate one, flagellum but little longer than the peduncle. Gna- 

 thopoda very unequal; the anterior ones rather feeble in structure, with the 

 carpus well developed, and forming below a broad setous expansion, propodos 

 scarcely longer than the carpus, and nearly triangular in form, palm well defined 

 and aoout the length of the hind margin, its edge smooth and slightly curved, 

 bearing a few small spinules besides fine hairs. Posterior gnathopoda exceedingly 

 powerfully developed, carpus extremely short and produced below to a narrow 

 setous lobe, propodos very large, nearly equalling in length the remaining 

 part of the leg, and considerably expanded distally, palm somewhat hollowed, 

 with a small projection above the middle, and having below on the outer 

 side a somewhat projecting, broadly -truncated lobe armed with 5 strong spines; 

 within the latter there is a groove, defined above bj'' a ridge bearing a similar 

 row of spines, and in this groove the oiiter part of the strong dactylus is 

 received, when bent in against the propodos. Pereiopoda, especially the 3 

 posterior pairs, extremely strongly built, and edged with fascicles of short 

 spines; basal joint of the latter pairs of moderate size and oval form, with the 

 posterior edge nearly straight, and quite smooth, meral joint considerably 

 expanded, and produced at the infero posteal corner to a triangular pointed 

 lobe; carpal joint prodiiced in a similar manner, and very broad in its outer 

 part; dactylus in all pairs strong and curved. Last pair of uropoda with the 

 inner ramus exceeding the outer by about '/^ of its length, both, as usual, edged 

 with strong spines. Telson very small and distinctly navicular in form, tip 

 evenly rounded. Body whitish, ornamented with patches of a dark l)rownish 



