140 THE VOYAGE OF H.M.S. CHALLENGER. 



wise a row of delicate bristles along the inner edge. The terminal pai't of the maxilliped, 

 comprising the three outer joints, is extremely slender, and about equals in length the 

 meral joint. Of its joints, the middle one is the longest, whereas the last (fig. 11) is 

 exceedingly small and truncate, bearing at the tip four ciliated bristles. The exopodite 

 (see fig. 10) is remarkably large, projecting even beyond the tip of the endojjodite, with 

 the l)asal part very elongate and muscular. The epipodite is wholly wanting. 



The first pair of legs, which in the two preceding genera are the ones peculiarly 

 modified, are in the present genus of exactly the same structure as the maxillipeds, 

 save their being a trifle more elongate, with the masticatory process obsolete and the 

 exopod somewhat shorter. 



The second pair of legs (fig. 22), on the other hand, are developed in a very peculiar 

 manner, being altogether dissimilar to any of the others. They are very elongate and 

 slender, also strongly geniculate, recalling to a certain extent the structure characteristic 

 of the first pair in the genus Nematoscelis, but difiering materially in the deviating form 

 of the two last joints. In the female (fig. 1) they ai-e somewhat more elongate than in 

 the male, about equalling, when fully extended, the posterior division of the body in 

 length ; but in other respects they fully agree in both sexes. Of the joints, the meral 

 and carpal are exceedingly produced and very movably connected, the former being by 

 far the longer. The carpal joint exhibits at the end a slight projection of the inner edge, 

 bearing a short curved spine ; but for the rest both these joints are perfectly smooth. 

 The propodal joint is much shorter than the carpal, attaining scarcely half its length, but 

 appears somewhat thicker, and, as it were, swollen, as also provided at both edges with 

 three strong spiniform bristles, those of the inner edge being by far the longer. The 

 terminal joint, finally, is very small, and bears five similar bristles, curving in a direction 

 opposite to that taken by those on the inner edge of the preceding joint. Thus both 

 these outer joints form together, as it were, a kind of grasping hand, though not so 

 decidedly prehensile in this as in the other sjjecies of the genus. 



The two succeeding pairs of legs (figs. 12, 13) difier very considerably in appearance 

 both from the first and second pairs. They are somewhat short, with the proximal part 

 of the endopod strongly appressed and laminar, as also gradually tapering toward the tip 

 of the meral joint. The ischial joint in both pairs is much the largest, being several 

 times longer than the meral ; both have a few slender bristles along the inner edge. The 

 terminal part is distinctly tri-articulate in the third pair (fig. 1 2), and somewhat longer 

 than the meral joint, whereas in the fourth pair (fig. 13) this part is exceedingly small 

 and only bi-articulate. 



The fifth or antepenultimate pair of legs (fig. 14) present an aspect, not agreeing with 

 any of the preceding pairs. They are rather small and have the endopod consisting of 

 only three joints, the first much the largest, somewhat curved, and provided along the 

 inner edge with a row of eight strong ciliated setae. The succeeding (meral) joint has on 



