472 



those of metasome elevated to compressed projections, the 2 anterior of which 

 however, are rather slight. First segment of urosome with a similar dorsal 

 projection at the end, as in the genus Paratyliis, but without any notch in 

 front of it. Cephalon produced in front to a rather large and compressed 

 rostrum, somewhat expanded distally, and obtusely rounded at the tip, lateral 

 corners rather broad and subtruncated at the tip, being defined from the 

 postantennal ones by a rectangular notch. Anterior pairs of coxal plates not 

 nearly as deep as the body, and oval quadrangular in form; 4th pair some- 

 what broader than the preceding pairs, but scarcely deeper, and only slightly 

 emarginated posteriorly; 5th pair nearly as deep as the former, and having 

 the anterior lobe produced to an obtuse deflexed point. Last pair of epiraeral 

 plates of metasome scarcely produced at the lateral corners, being nearly 

 rectangular, posterior edge smooth. Eyes very small, rounded oval in form, 

 pigment very dark. Superior antennae not nearly attaining J /3 of the length 

 of the body, and rather strongly built, peduncle elongated and rather hairy, 

 with the 1st joint about the length of the 2nd, and the last one half as 

 long, flagellum scarcely longer than the peduncle, and composed of about 22 

 articulations clothed with short bristles, accessory appendage very small, 

 uniarticulate and lying inside the flagellum. Inferior antennse scarcely as 

 long as the superior, the last 2 joints of the flagellum of nearly equal length 

 and rather densely setous, flagellum shorter than those joints combined. 

 Anterior gnathopoda short and stout, carpus not very elongated, and gradually 

 widening distally, propodos about the length of the 2 preceding joints com- 

 bined, and rounded oval in form, with the superior edge densely clothed with 

 bristles, palm rather short and imperfectly defined below, dactylus short and 

 stout. Posterior gnathopoda somewhat more elongated than the anterior, but 

 otherwise of a very similar structure. The 2 anterior pairs of pereiopoda 

 somewhat unequal in length, the 2nd pair being considerably shorter than 

 the 1st, meral joint in both pairs rather broad, and produced at the end 

 anteriorly to a conical point. The 3 posterior pairs with the 3 outer joints 

 of nearly equal length, basal joint of antepenultimate and penultimate pairs 

 rather narrow and tapering distally, that of last pair, on the other hand, 

 very much expanded, being even broader than it is long, posterior edge 

 strongly curved, and forming below a broadly rounded lobe defined in front 

 by a small notch, dactylus in all pairs rather strong. Last pair of uropoda 

 with the basal part quite short, rami narrow lanceolate, and having, in 

 addition to the marginal bristles, a few small denticles. Telson oval triangular 

 in form, considerably longer than it is broad at the base, cleft extending 

 nearly to the base, terminal lobes tapering to an obtuse point carrying a 



