REPORT ON THE AMPHIPODA. 1375 



toothed ; the palp reaching beyond the outer plate, widening distally, tuu broad apex 

 set with minute spine-teeth and having a larger spine near the inner angle. 



Second Maxillae. — The inner plate considerably shorter than the outer, with one 

 spine at the apex, the outer plate with two spines at the apex and one on the inner 

 margin below the apex, each of these spines having a lateral tooth ; both plates have 

 numerous hair-lite setules. 



MaxUMpeds. — The inner plate large, three-sided, the inner surface constituted by 

 two of the sides which are covered with hair-like setules, the narrow apex carrying two or 

 three spines ; the outer plates long and narrow, very finely ciliated, with a small spine 

 at the acute apex, a setule in a notch a little below it on the outer margin, another in a 

 notch rather lower on the inner margin, and a third lower than this on the outer margin ; 

 the first joint or chin is short, while the following joint is long, longer than the outer 

 plates. 



First Grnathopods. — The side-plates in this species are not jointed. First joint of 

 the limb a httle sinuous, not very elongate, wider below than above, smooth-edged, 

 adapted for gland-cells, as seems to be the case in all the six following pairs of limbs ; 

 second joint not longer than broad ; third joint rather longer, with a spine at the apex 

 of the hind margin and a larger one in the middle of the minutely pectinate distal 

 margin ; the wrist a little shorter than the hand, wider above than below, the front 

 margin convex, smooth, the hinder with a spine standing out above the middle, where 

 the joint begins to narrow ; the hand not very much shorter than the first joint, 

 narrow, and narrowing distally, the front margin smooth, the hinder ciliated and having 

 a serrature of four points wide apart ; the finger curved, not half the length of the 

 hand, armed all along with two or more rows of long, closely set cilia ; the nail short. 



Second Grnathopods. — First and second joints as in the preceding pair, but larger ; 

 third joint longer than the second, without spines ; the wrist distally cup-like, not so 

 wide as the hand, much wider than the third joint, but not longer, apart from the long, 

 tapering, partially channelled process into which its hinder margin is produced ; the 

 apex of the process, which appears to be a little pectinate, carries an acute spine ; the 

 massive hand, of which the basal part is much longer than broad, and much longer 

 than the process of the wrist, has its hind part prolonged into a broad, somewhat 

 tapering, blunt-ended thumb ; the triangular tapering finger applies closely against 

 the irregular front or inner margin of the thumb, forming a complete chela ; the blunt 

 (perhaps worn) apex of the finger in our specimen does not quite reach the apex of the 

 thumb ; the front margin of the finger is rather concave than convex. 



First Per&opods.—Th.e first joint similar to that in the gnathopods, but more 

 elongated, as long as the third and fourth joints together ; the second joint longer than 

 broad ; the third much longer than the second, widening distally, the hind margin 

 minutely pectinate, carrying three spines at intervals, the lowest the iargest ; the 



