A NEW TYPE or AMPHIPODA. 121 



to the end of the third joint, and has a couple of short setje on 

 the terminal rounded margin. The third joint is slightly longer 

 than the second, without a vestige of any lohe, but with two setas 

 on the lower side near the inner margin. The three following 

 joints are somewhat longer than the proximal ones, each with 

 only one seta, which on the fourth and fifth joints is inserted 

 at the inner margin, on the sixth more distant from that margin. 

 The seventh joint is subcorneal, with two distal setae, and 

 terminating in a long setif orm claw. 



First Pair of TJwracic Legs (fig. 2). — The basal joint is short, 

 considerably broader than long, rounded off anteriorly. The 

 second joint is nearly as long as the segment, about twice as 

 long as broad, with the posterior margin very convex. The 

 third and fourth joints are short, with a short subapical hair on 

 the lower margin. The fifth joint forms the hand, which is some- 

 what longer than the head, oblong, almost three times longer 

 than broad, with the anterior margin rather strongly but not 

 regularly convex ; the apparent posterior margin is aa a whole 

 sinuate but slightly convex, consisting of the palm and the free 

 posterior margin, which are marked off from each other by a 

 minute process (fig. 11,^.), and the palm is two and a half times 

 longer than the free posterior margin. The palm (fig. 11) 

 presents a feeble, somewhat angular incision near its proximal 

 end, and just above that point a rather small but robust spine 

 originating on the inner surface near the margin; the palm 

 beyond the incision is feebly convex, with some faint saw-teeth 

 and a few minute hairs on the distal half, on the proximal half 

 a small spine from the inner surface and two short setae on the 

 outer side. In the hand no internal gland could be discovered. 

 The finger consists of three elements about equal in length, viz., 

 the sixth joint, the seventh joint, and the real claw (fig. 11) ; 

 notwithstanding the whole finger is claw-shaped, considerably 

 curved, and about two-thirds as long as the hand. The articulation 

 between the sixth and the seventh joint is irregularly sinuate 

 and the movement allowed must be slight ; the sixth joint 

 contains, however, two slender muscles to the seventh joint. The 

 seventh joint is coalesced with the claw, a transverse suture 

 between them cannot be discovered, but the posterior distal 

 angle of the joint is produced into an oblong triangle, which is 

 sharply marked off from the posterior margin of the claw. 



Second Fair of Thoracic Legs (fig. 2), — In the main similar to 



