HYPERIA OBLIVIA. 17 
lateral wall. The superior pair of antenne are about 
as long as the head is deep. The peduncle is short; the 
flagellum stout at the base, gradually tapering to the 
apex, and is marked with a few imperfectly-defined rings. 
The inferior antennz are more slender than the superior, 
a little longer, and terminate in a multiarticulate 
flagellum. The hands can scarcely be described as sub- 
chelate, although they possess a tendency in the direction 
common to most animals in the division. The third and 
fourth pairs of legs are long, and have the wrists thicker 
than any other joint; the hands are long and slender 
and tipped with sharp fingers. The three succeeding 
pairs are also uniform in shape, and nearly of equal 
length, the last being rather the shortest; these have 
the sixth joint remarkably long, and have the anterior 
margin of each with the distal half fringed with short, 
straight, evenly-planted cilia, and a few scattered longer 
ones. The caudal appendages are rather long and 
slender. 
The colour of this species, if we can trust to that of 
an animal that has been dead a short time, appears of a 
light straw, having the back starred with a few spots of 
black pigment. 
We have frequently doubted whether this species 
strictly belonged to the present genus. But finding that 
it agreed very closely with H. trigona, of Dana, from 
Cape Horn, we have considered it desirable that it 
should remain therein for the present. The form of the 
first two pairs of walking legs differ from the more 
typical species. The two succeeding pairs of legs in 
their length and armature suggest a relationship to the 
genus Cyllopus, which is also supported by the form of 
the inferior pair of antenne, but from that genus this 
VOL. IT. c 
