243 



prqjentiiig, aiul bluntly angulated. Second pair of coxal plates scarcely- 

 expanded in tlieir outer part, distal edge slightly sinuated, and defined 

 posteriorly by a projecting angle; 3rd pair somewhat larger, and gradually 

 widening below; 4th pair scarcely as large as the 2 preceding pairs 

 combined, bhintly produced posteriorly, distal edge somewhat obliquely 

 curved. Last pair of epimeral plates of metasome moderately produced at 

 the lateral corners, Ej'es rather large, rounded, without any distinctly 

 developed visual elements, pigment light yellowish red. Antennae extremely 

 slender and elongated; the superior ones fully as long as the whole body, 

 2nd joint of the peduncle considerably longer than the 1st, which somewhat 

 exceeds the length of the cephalon, flagellum about twice as long as the 

 peduncle, and very slender, filiform. Inferior antennae in female a little 

 shorter than the superior, in male somewhat longer, the 2 outer joints of 

 the peduncle very much elongated, and nearly equal-sized, flagellum much shorter 

 than the last peduncular joint. Maxillipeds very slender and elongated. 

 Anterior gnathopoda comparatively small and feeble, meral joint produced 

 in the usual manner, propodos about the length of the carpus, and but little 

 broader, its palm somewhat oblique, though not attaining the length of the 

 hind margin, Posterior gnathopoda very large and powerful, especially in 

 the male, propodos largely developed, fully as long as the basal joint, and 

 oblong oval in form, slightly tapering distally, palm very oblique, forming 

 anteriorly a lamellar, dentated expansion, and being defined posteriorly by 

 a distinctly projecting angle armed with 2 strong spinules, its edge in 

 female very slightly concave and irregularly serrated, in male divided into 

 3 very strong and curved dentiform projections, dactylus strong and curved, 

 its inner edge in male finely ciliated. Pereiopoda rather slender and 

 densely edged with fascicles of short spinules, meral joint in all very narrow 

 and elongated, fully as long as the 2 outer joints combined, and but very 

 slightly produced at the end; basal joint of the 3 last pairs of moderate 

 size, and oval in form. Uropoda rather slender, last pair with the basal 

 joint nearly twice as long as the outer 2 combined, and armed with about 

 10 denticles. Telson of moderate size, oblong oval in form, and armed 

 with 3 pairs of dorsal denticles, outer part somewhat narrowed. Body 

 whitish, pellucid, with scattered orange-coloured patches, legs and urosome 

 somewhat more intensely coloured; ova in the marsupial pouch of a light 

 violaceous hue. Length of adult female 8 mm, of male about the same. 



Remarks. — Boeck erroneously described this form as a Mctopa. 

 It belongs, however, quite certainly to the genus Sfenothoe, as characterized 

 by that author. From the other species, it is at once distinguished by its 

 slender form of body, the very much elongated antennae, and the structure of the 



