REPORT ON THE AMPHIPODA. 1541 



narrower, having a feathered spine on each margin ; the finger half the length of the 

 hand, very narrow, feathered, with a very sharp nail ; in one example the finger was 

 bent as if impinging against the apical process of the hand, in the other examples it 

 appears to be stiff and straight, lmt whether the curvature was accidental or the apparent 

 Fstraightness due only to an optical effect I am uncertain. 



Second Gnathopods rather longer than the first. The side-plates small, wider than 

 deep. The first joint as long as in the first gnathopods, but much less expanded, the 

 front margin convex, the hinder a little sinuous ; the second joint slightly longer than 

 broad ; the third joint longer than the second, armed as in the first gnathopods, but 

 rather oblong than triangular ; the wrist longer and broader than the third joint, 

 broader but shorter than the hand, the front margin ciliated, nearly straight, the hind 

 margin a little ciliated below, with three apical feathered spines ; the hand two and a 

 half times as long as broad, ciliated on both margins, carrying a feathered spine at the 

 hinder apex ; the finger as long as the hand, slender, a little curved, feathered with cilia 

 except near the base, apically produced into two acute processes, one longer than the 

 other both finely pectinate, with a slender spine or nad between them, which projects a 

 little beyond the longer. 



First Pemopods much stouter than the second gnathopods, but not nearly twice 

 as long. Side-plates rather wide and shallow, a little deeper behind than in front. 

 Branchial vesicles simple, more or less oval, easily detached, all the pairs very similar. 

 The first joint widening distally, the front margin sinuous, the hinder convex ; the second 

 joint little longer than broad ; the third joint widening distally, a little decurrent at the 

 front apex ; the fourth joint a little narrower than the third, with the muscles placed 

 near the front, to make room for a glandular cavity, which exhibits the system of 

 branched cuticular canals, leading from the gland-cells to the exits, as figured by Claus 

 for Phronima (Phronimiden, Taf. iii. fig. 16) ; fifth joint as long as, or a little longer than, 

 the third or fourth, a little bent, width almost uniform, the hind margin sinuous, with 

 two minute cilia, and a tooth-like apex, within which there is a very small spine ; the 

 finger curved, very acute, more than half the length of the fifth joint. 



Second Perteopods a little larger than the first, simdar. 



Third Pcrseopods. — Side-plates wider than deep, bilobed. First joint dilated, the 

 lower half more than the upper, longer than broad ; the second and following joints very 

 similar to those of the preceding perseopods, but all on a somewhat larger scale, the third, 

 fourth, and fifth joints subequal in length, the fourth with the front margin finely 

 pectinate, the fifth with that margin rather more strongly and more deeurrently pectinate. 



Fourth Perzeopods not very much shorter than the preceding pair ; the first joint 

 larger than in the preceding pair, its greatest width near the base, diminishing down- 

 wards ; the following joints narrower than in any of the preceding perseopods. the fourth 

 joint shorter than the third, with the glandular space either absent or much reduced, the 



