REPORT ON THE AMPHIPODAl 847 



those on the three following joints, having abruptly contracted pectinate terminations ; 

 the second joint with a distal group of spines at the back ; the third joint not greatly- 

 longer than the second, with a group of spines round the curve which unites the lower 

 and hinder margins, and another group on the inner surface within the lower front apex, 

 which apex rests against the outside of the wrist ; the wrist distally broad, the wing 

 carrying spines on its inner surface and bordered with them, its expansion forming a 

 cup for the hand, it being also slightly produced so as to form a calx, the effect of which 

 is increased by the apparent tendency of the hand to bend towards it ; the hand large, 

 oval, longer than the wrist, all the hind margin, except the short piece which the wrist 

 can overlap, being defined as a convex palm densely ciliated and fringed with setules ; 

 on the inner surface there are some rows of long pectinate setae reaching to the front 

 margin ; the teeth in many standing at a right angle to the length of the seta ; there are 

 also smaller groups near the palm ; the long curved finger when closed fits the palm 

 border, reaching the small palmar spine ; the dorsal cilium very small, near the base. 



Second Gnathopods. — Side-plates with front and hind margins nearly parallel, 

 fringed, though less densely than the lower margin, lower margin rounded, chiefly at 

 the corners. Branchial vesicles large, irregularly folded, seemingly of very thin texture. 

 First joint reaching much beyond the side-plate, carrying long setae on the margins, 

 this and the remaining joints closely resembling the corresponding joints of the first 

 gnathopods in shape and armature, but exceeding them in length ; the third joint rather 

 more squared at the hinder distal angle, the wrist with its wing slightly more produced, 

 the hand considerably longer but only slightly wider, the finger not quite reaching the 

 two small palmar spines ; the inner side of each gnathopod is represented in the Plate, 

 from which it will appear that the hand of the second gnathopod is devoid of the long 

 pectinate setae which adorn the hand of the first. 



First Perwopods. — Side-plates rather longer and broader than the preceding pair, 

 otherwise similar. Branchial vesicles in this and the following pair very extensive and 

 lightly crumpled. The first joint not reaching beyond the side-plate, fringed on both 

 margins with long and short setae, some of them plumose ; the second joint short ; the 

 third not decurrent, with spines singly or in groups along the straight hind margin, and 

 one group at the front apex ; the fourth joint narrower and a little shorter, with 

 numerous groups of spines, some of them large and long, fringing the hind margin, 

 and a group of setae at the front apex ; the fifth joint as long as the third, armed at 

 eight points on each margin, the name of spines being suitable to the furniture of the 

 straight hind margin, of setae to that of the slightly convex and serrate front margin ; 

 the finger a little shorter than either the fifth or fourth joint, slightly boat-shaped, 

 tapering to a very small nail with a narrow cap projecting beyond it. 



Second Perwopods. — Side-plates scarcely longer than those of the preceding pair, 

 rather deeply excavate behind, the plate being widest at the lower angle of the 



