REPORT ON THE CUMACEA. 57 



of small denticles arranged along its outer part iu three rows. The whole inner edge 

 of this joint, as also the greater part of the outer, is moreover provided with numerous 

 slender ciliated setse. The terminal jiart of the leg is considerably longer than the 

 basal, and has the two first joints comparatively short, and the three outer joints very 

 slender. Of the latter the two first are about equal in length, whereas the last joint 

 is considerably more elongate, and provided along the inner edge with numerous short 

 bristles, and at the tip with a number of curved claw-like spines. The exopodite 

 exhibits the usual structure and has the basal part armed on the outer edge with a 

 row of about eight spines, besides a few slender setse. 



The second ijniv of legs (fig. 5) are scarcely more than half as long as the first, and 

 have the basal joint rather large, and armed on the lower side with numerous spines, 

 five of which form a regular row along the outer edge. The ischial and meral joints 

 have each two strong spines at the end. The carpal joint exhibits the usual slender 

 form and is devoid of spines, whereas a row of simple bristles occur along its inner 

 edge. The terminal joint is conical, and considerably longer than the propodal joint; 

 both taken together are about as long as the carpal joint. 



The three posterior pairs of legs (figs. 6, 7) are rather slender, and more or less 

 spinous in their proximal part. Of the joints composing the terminal part, the meral 

 and carpal are the longest and about equal in length. 



The telson (see fig. 8) is not very elongate, scarcely more than twice as long as the 

 last caudal segment. The basal part is regularly cylindrical, and in some specimens 

 armed along the dorsal surface with a median row of spines. The terminal part does 

 not exceed the basal in length, and tapers gradually to the tip, which is armed with 

 two very elongate spines ; the edges are also densely spinous, but the spines are much 

 smaller than those springing from the tip. 



The uropoda (ibid.) are about half as long as the tail, with the scape rather slender, 

 and armed alouof the inner edge with about ten small denticles. The branches are 

 comparatively short, and somewhat unequal in length, the inner being considerably 

 shorter than the outer, and consisting of but two joints of nearly equal length. Both 

 joints are spinulose along the inner edge, the number of spines in the specimen dissected 

 being seven, besides the strong spine issuing from the tip of the branch. The outer branch 

 is more slender than the inner, and exhibits at the tija three equal -sized spiniform setse, 

 besides a row of very small bristles along the outer edge. 



Habitat. — Of the present form several specimens were collected on January 29, 

 1874, ofi" Cumberland Bay, Kerguelen Islands, from a depth of 127 fathoms. Station 

 129H. 



(ZOOL. CHALL. EXP. — PART LV. — 1887.) lii 8 



