[5-7J DECAPODA FROM ALBATROSS DRtDGINGS. 401 



nuicli shorter than the segment itself; both edges of the dactylus, the 

 extremity and inner edge of the propodus, and the inner edge of the 

 carpus, are armed with exceedingly long and slender setiform spines, 

 and the inner sides of the proximal segments are, as usual, armed with 

 setse. The exopod is slender, reaches a little beyond the ischium, and 

 is distinctly multiarticulate to near the base. The epipod is narrow, 

 and not longer than the breadth of the ischium. 



The first and second pera^opods are very nearly equal in length, the 

 first reaching about to the extremities of the i)eduncles of the an- 

 tennae, and the second scarcely falling short of the same point. In both 

 the corresponding segments are of very nearly equal lengths, except 

 the carpi, which are a very little longer in the second, but the ischia, 

 meri, and carpi are narrower in the second than in the first : the ischium 

 is about two-thirds as long as the merus, half as broad as long in the> 

 first and scarcely more than a third as broad as long in the second; the 

 merus is about a third of the entire length of the endopod, slightly nar- 

 rowed distally, and in the first more than a third as broad as long, but 

 in the second scarcely more than a fifth as broad as long; the carpus in 

 the first is about two-thirds as long and half as wide as the merus, while 

 in the second it is longer and absolutely a little narrower than in the 

 first; the chelaB are very nearly alike in both pairs, nearly as long and 

 about as broad as the carpus in the second pair, with the digits slender, 

 curved at the tips, and about two- fifths of the whole length ; the edges 

 of the chelaB are furnished with fascicles of short setse, the tips of the 

 digits densely clothed with much longer sette andhairs, the inner edges 

 of the oth'^r segments thickly clothed with plumose hairs and long sette, 

 and the outer edges sparsely clothed with short hairs, except on the 

 carpus in the first pair where the outer edge is thickly hairy. The 

 third perseopods are considerably longer and much more slender than 

 the second, beyond which they reach by the length of their chelae. : the 

 ischium is about as long as in the second, but narrower ; the merus is 

 twice as long as the ischium, very slender, and of nearly equal diameter 

 throughout ; the carpus is a little shorter and scarcely stouter than the 

 merus, and very slightly thickened distally ; the chela is very near the 

 same size as in the first and second pairs, but the digits are a little 

 longer in proportion. 



The fourth and fifth peraeopods are nearly alike, a little longer than the 

 third and very slender, the fifth being a little more slender than the 

 fourth, and both si)arsely armed witli long setiform spines, except upon 

 the dactyli, which are nearly naked, long, very slightly curved, and 

 acute. 



The pleon to the tip of the telsou is about twice as long as the carapax, 

 anteriorly about as broad as the carapax and with the dorsum broadly 

 rounded, but much compressed posteriorly, so that the sixth somite is 

 twice as high ae broad. None of the anterior somites are dorsally cari- 

 nated or toothed, but the sixth, which is about tv^ice as long as the fifth 

 S. Mis. 46 26 



