REPORT ON THE AMPHIPODA. 1139 



fringed with submarginal spines of various lengths. The finger is broad, with the inner 

 margin toothed, closing tightly along the palm till the nail which bends rather sharply 

 on to the surface within the apex of the hind margin ; the dorsal cilium is small, close to 

 the base. 



Second Gnathopods. — Side-plates considerably larger than the preceding pair. 

 Branchial vesicles narrow, shorter and narrower than the first joint. Marsupial plates 

 longer than the first joint and much broader, especially at the centre, surrounded by 

 setae which are not extremely long. The limb in the female differing very little from 

 that of the first gnathopods, but with the hand rather larger. In the male the third 

 joint is, as in the female, more oblong than in the preceding pair, with several spines 

 about the distal margin which is pointed in front, rounded behind ; the wrist is very 

 small in comparison with the hand, triangular, distally cup-like, with some short stiff 

 spines at the apex of the front margin, and long spines on the short free portion of the hind 

 margin ; the hand large, oval, broadest near the base, with many slender feathered spines, 

 distributed much as in the first gnathopods, the serrate hind margin ending in a small 

 apical tooth, within which is a palmar spine, near to which the oblicmely sinuous palm is 

 smooth for a short space, then has one or two low tubercles followed by two that are 

 large and irregular in outline, concluding with a nearly straight tract of seven or eight 

 little tubercles which reach the hinge ; the broad curved finger bends on to the surface 

 within the palmar spine ; the dorsal cilium is short, near the base ; the inner edge of the 

 finger is cut into little spinedike rather distant teeth, and has some setules near the base 

 of the nail. 



First Perseopods. — Side-plates larger than the preceding pair. Marsupial plates 

 longer than the first joint. The first joint reaching beyond the side-plate, packed with 

 gland-cells in three rows ; the margins with a few small spines and spinules ; the second 

 joint short, with one or two slender spines at the hinder apex ; the third joint longer 

 than the fourth, as long as the fifth, widening downwards, a little decurrent, with slender 

 apical spines ; the fourth joint slightly armed at the apex in front, and at two or three 

 points of the hind margin ; the fifth joint narrowing distally, the hind margin almost 

 straight, bordered with a few spinules or setules ; the finger narrow, curved, about three- 

 quartera as long as the fifth joint, with an opening in the tip. 



Second Perseopods. — The side-plates larger than the preceding pair, the margins 

 convex. The limb like that of the first perseopods. 



TJiird Perseopods. — The first joint broad throughout its length, with five or six 

 minute spines on the front margin and two or three slender ones at its apex, the convex 

 hind margin almost smooth ; the second joint short with some spinules at the apex in 

 front ; the third joint much longer than the fourth, about as long as the fifth, with 

 spines at three points of the hind margin, and at two of the front ; the fourth joint with 

 spines at two points in front, and a group at the apex behind ; the fifth joint with spines 



