622 



very long ventral spine. Cephalon produced in front to a distinct, somewhat 



flattened rostrum, lateral corners angular and but slightly projecting. First 



pair of coxal plates conically produced in front ; 2nd pair deeper than the 



other pairs, their outer part being in female obtusely rounded, in male 



angularly produced. Epimeral plates of metasome comparatively small, each 



being produced below to a sharp, recurved point. Eyes nearly obsolete, being 



replaced on each side by an irregular patch of whitisli pigment, Superior 



antennae very slender, and equalling in length the cephalon and mesosome 



combined, 2nd joint of the peduncle considerably longer than the 1st, 3rd 



joint very short, scarcely exceeding in length l /a of the 2nd, flagellum about 



the length of the peduncle, and composed of about 14 articulations, accessory 



appendage very small, biarticulate, with the last articulation extremely 



minute. Inferior antennae in female not very strong, and considerably shorter 



than the superior, penultimate joint of the peduncle a little longer than the 



last one. and rather narrow, flagellum scarcely longer than the last peduncular 



joint and 6-articulate; inferior antennae in male much more strongly developed, 



subpediform, with the penultimate and antepenultimate joints of the peduncle 



considerably thickened and connected by a very movable articulation. Anterior 



gnathopoda in female less strongly built than in the preceding species, with 



the carpus of moderate size and broadly expanded below, propodos oval 



triangular in form, with the palm very oblique and nearly straight, being 



defined posteriorly by an obtuse angle ; those in male considerably stronger, 



with the palm of the propodos distinctly bisinuate. Posterior gnathopoda 



slender and of same structure in the two sexes, though somewhat larger 



in the male, carpus very large and densely setous on the lower edge 



and the distal part of the upper one, propodos couparatively small, being 



much shorter than the carpus, and gradually tapering distally, without any 



palm, dactylus extremely minute. Pereiopoda very slender, the 3 posterior 



pairs with the basal joint rather narrow and nearly smooth. Branchial 



lamellae very small. The 2 anterior pairs of uropcda less robust than in 



the preceding species, and having the rarni tipped by several strong spines; 



last pair with the inner expansion of the basal joint rather narrow and only 



armed with a single spine, terminal joint projecting beyond the former and 



sublinear in form, with 5 long apical bristles and another in the middle of 



the outer edge. Telson rounded, with 2 slender spines on either side, 



accompanied by a delicate bristle. Body of a pale yellowish hue, with more 



or less distinct light orange bands across the segments, and having moreover 



along the sides a series of irregular whitish patches produced by some opaque 



matter lying inside the integuments. Length of adult female 5 mm., of 



male G mm. 



