REPORT ON THE AMPHIPODA. IDS.") 



inner side of which is serrate, and within which is set a strong palmar spine projecting 

 beyond the tooth, and from this the finely but irregularly denticulate palm takes an oblique 

 sinuous course to the hinge of the finger ; besides the marginal groups of spines there are 

 others on the surface and adjoining the palm, which is also fringed with short spines ; 

 the finger is much curved, and its sharp tip closes on to the surface at the base of the 

 palmar spine, leaving a narrow space between the concave part of the palm and the distal 

 inner margin of the finger ; the inner margin almost to the nail is cut into numerous 

 decurrent teeth, with spinules at the base of some of them, the dorsal cilium is lightly 

 feathered, short but rather stout, near the base of the finger. 



Second Gnathopods. — Side-plates small, rather broader and deeper than the 

 preceding pair. First, second, and third joints of the limb much as in the first 

 perajopods ; the wrist nearly as long, but a good deal less broad, similarly armed, the 

 spines of the hind border forming nine groups ; the hand is as long as the wrist, almost 

 oblong, with several groups of spines at or near the convex frout margin, twelve groups 

 along the serrate hind margin, which is not as in the first gnathopods very much shorter 

 than the first ; there are several other groups of spines along the surface and near the 

 palm ; the hind margin on one of the limbs produced into a small tooth, on the other it 

 is not produced into a tooth, but it forms a definite angle, almost a right angle, with the 

 slightly sinuous, finely pectinate, spine-bordered palm ; the finger is stout, curved, of a 

 length to fit the palm, the inner margin cut into teeth with a setule to every second or 

 third tooth, and two or three longer setules near the base of the sharp nail, in respect to 

 these and the dorsal cilium resembling the first gnathopods. 



First Perseopods. — Side-plates like the preceding pair. First joint reaching much 

 beyond the side-plate, pretty evenly broad except at the neck, packed with gland-cells, 

 with some spinules along the front margins, some small spines along the hinder, and 

 some moderately long setas at the upper part of both ; the second joint short, with a 

 slender spine or two at the apex ; the third joint much longer than the fourth or fifth, 

 like the two preceding joints having abundance of gland-cells, which are dark in the 

 preserved specimen ; there are spinules and slender spines on both margins but in no great 

 numbers ; the fourth joint is much broader but a little shorter than the fifth, having the 

 almost straight hind margin fringed with slender spines, the front margin more convex 

 and carrying a spinule above and two or three small groups of spines below ; the fifth 

 joint narrows a little distally, and has nine or ten groups of slender spines on the hinder 

 and two on the front margin ; the finger is sbghtly curved, not half the length of the fifth 

 joint, with a feathered cilium near the base, and an opening within the apex for the 

 excretion from the gland. 



Second Perseopods. — Side-plates wider than deep. The limb nearly as in the 

 preceding pair. 



Third Peraeopods. — Side-plates broad but shallow, the front lobe a little deeper but 



