274 DREDGING REPORT, 1862. 
The first feet (Pl. XIII, fig. 4), have the first joint curved 
forwards, and three to four times as long as broad, with the 
posterior margin as well as the proximal half of the anterior 
margin fringed with plumose cilia; there is also a spine near 
the distal extremity of the anterior margin; the second, third, | 
and fourth joints incline backwards, the second has the ante- 
rior, and third and fourth both margins beset with plumose cilia, these 
three joints are short, and taken together are only equal in length 
to the first. The fifth joint is equal to the fourth, and has 
only a single plumcse cilium at the distal extremity of the 
anterior margin. The sixth segment has an oblique palm which 
is furnished with a tuft of numerous long, slender, and slightly 
curved spines. Thesecondary member of the leg, or palp, together 
with its expanded basal joint scarcely exceeds in length the first 
joint of the leg itself. 
The fourth foot (Pl. XIII., fig. 5), is stout and strongly built, 
and is furnished with a palp which equals itself in length. The 
first three joints are furnished with one or two plumose cilia, 
the second and third having also one or two small spines on the 
anterior margin. The fourth jomt has the postero-distal ex- 
tremity provided with three or four long whip-cilia. The fifth 
joint terminates in two long whip-cilia. 
The fifth foot (Pl. XIIL., fig. 6), has the first joint very long,— 
equalling half the total length of the leg—and furnished with 
four plumose cilia on the posterior margin, and one at the distal 
extremity of the anterior margin. The second joint, which is 
very short, has a single plumose cilium on the front margin. 
The third joint resembles very nearly the second. The fourth 
joint, which is also very short, has two minute spines, situated 
anteriorly, and three whip-cilia having their basal portions 
plumose attached to the postero-distal extremity. The fifth 
joint terminates in two whip-cilia. 
The telson (PI. XIIL, fig. 6), is very short, scarcely one third 
of the length of the peduncle of the lateral caudal appen- 
dages, and has the extremity rotunded and unarmed. 
The peduncle of the lateral caudal appendages has the inner 
margin clothed with an intermixture of spines and cilia which 
