REPORT ON THE AMPHIPODA. 675 



scopically furred as far as the angle ; tlie palm at right augles to the hind margin, 

 convex, cut into irregular microscopic -teeth, defined by two strong spines, between 

 which the finger closes down ; the finger, which neatly fits the palm, has, besides the dorsal 

 cilium, one on the inner margin near the hinge, and two on the side near the tooth of 

 the inner margin. There is a row of cilia on the hand on either side of the palm. 



Second GnatJiopods. — Side-plates oblong, little rounded, much narrower than the 

 preceding pair. First joint elongate, narrow ; second joint a little shorter than the 

 wrist ; third joint shorter than the second, furred behind, apically rounded and armed 

 with long pectinate spines ; the wrist furred almost all over, having the not unusual 

 scale-like ornaments on the breast ; from a narrow neck near the base the joint expands 

 evenly to its junction with the hand, here carrying on either side long pectinate spines ; 

 the hand a little shorter than the third joint, narrow at the base, front margin convex, 

 carrying several rows of curved spines pectinate on two edges, and occupying much of 

 the apical margin, this part carrying also a row of setules ; the very small finger set far 

 back closes tightly down upon the small, convex, inward -sloping, pectinate palm ; near 

 the nail the finger has a denticle on its inner margin ; the dorsal cilium is placed rather 

 nearer to the nail than to the hinge. 



First Peraiopods. — Side-plates similar to those of the preceding pair-, but larger. 

 Branchial vesicles broad, without folds. First joint shorter than the second and third 

 united ; third joint scarcely produced downwards, much longer than fourth, subequal in 

 length to the fifth joint ; third, fourth and fifth joints with some very slender spines on 

 the hinder margin ; fifth joint narrow, with some short spines on the hinder margin ; 

 finger short, curved, with a very small dorsal cilium. 



Second Perwopods. — Side-plates very broad below, much excavated behind, the 

 joints similar to those of the preceding pair, the third, fourth and fifth rather smaller. 



Tliird Perwopods. — Side-plates as broad as long, hinder lobe more outdrawn down- 

 wards than the front ; first joint broad, a little narrowed below, scarcely longer than its 

 breadth, attached to the middle of the lower margin of the side-plate by a sort of 

 pocket or fold of its front margin, front margin with half-a-dozen small spines, hinder 

 with six or seven minute notches ; the third joint broad, produced downwards behind, 

 some short spines and spine-like setse or seta-like spines on the margins ; the fourth joint 

 a little shorter than the third, with spines on the front margin ; the fifth joint much 

 longer than the fourth, with very small spines on the front margin ; finger short, curved. 



Fourth Perseopods. — First joint longer than broad, attached as in the preceding pair, 

 its nearly straight front margin with few spines, the hind margin with distant notches ; 

 the third joint longer, less expanded in proportion to its length than in the preceding 

 pair, with two spines on its hind margin ; the fourth and fifth joints likewise longer; the 

 finger short. 



Fifth Perseopods. — These ore similar to the fourth pair, except that the first joint is 



