337 



segment (exclusive of the rostrum) about equal in length to the 3 succeeding 

 segments combined ; rostral plate rather prominent, narrow quadrangular in shape, 

 and obtusely truncated at the end. Epimeral plates of the 3 succeeding segments 

 acutely produced at the hind corner. Last pedigerous segment very short. Uro- 

 some a little exceeding half the length of the anterior divison, and having the 

 hind edge of the segments coarsely spinulose, genital segment about the length 

 of the 2 succeeding segments combined. Caudal rami scarcely as long as they 

 are broad at the base, and partly spinulose at the edges, middle apical setae 

 rather slender, the inner one exceeding half the length of the body. Eye of 

 quite unusual size, and very conspicuous in the living animal. Anterior antennae 

 rather small and feeble, being of nearly equal width throughout, and composed 

 of only 4 joints, the last one, representing the terminal part, carrying several 

 strong spinulose setee pointing in different directions. Posterior antennae with a 

 coarse curved seta issuing from the middle of the proximal joint in front; outer 

 ramus a little shorter than the distal joint, and carrying 5 setae, one of the 

 2 apical ones rather elongated. Posterior maxillipeds with the hand rather 

 narrow and very finely ciliated inside. 1st pair of legs with the inner ramus 

 projecting somewhat beyond the outer, distal joint linear in form, and more than 

 twice the length of the proximal one, carrying on the tip 3 coarse spiniform setae; 

 inner ramus of 2nd pair likewise extending a little beyond the outer, that of the 

 2 succeeding pairs successively somewhat shorter, tip of the ramus in these pairs 

 armed in a manner similar to that in the 1st pair. Last pair of legs with 

 the distal joint comparatively small and cordiform in shape, carrying 5 rather 

 short setae, that issuing from the tip very thin, hair-like; proximal joint exhibiting 

 at the junction with the distal joint a transverse row of slender spinules, inner 

 expansion comparatively large, linguiform in shape, and extending far beyond the 

 distal joint, marginal setae 5 in number, the outermost but one considerably 

 elongated. 



Male considerably smaller than female and of somewhat more slender form 

 of body. Anterior antennae much more strongly built and 5-articulate, 4th joint 

 globularly inflated, terminal joint unguiform. Inner ramus of 2nd pair of legs 

 with the middle joint produced at the end outside to an exceedingly strong de- 

 iiexed rnucroniform process of about the length of the whole ramus, the terminal 

 joint being much reduced in size, lamelliform. Last pair of legs with the inner 

 expansion of proximal joint very small and provided with only 2 short setae. 



(Body of a light bluish grey colour, with a faint rosy tinge. 

 Length of adult female 0.58 mm. 



45 Crustacea. 



