APPENDIX. 525 
THE pereion has the first segment short, each segment 
gradually increasing in length posteriorly to the third segment 
of the pleon. The eyes are vertically of an oblong oval form, 
The first pair of antenne have the flagellum vertically and 
longitudinally flattened, the inner surface being furnished 
with two central rows of cilia, the cilia in one row being 
directed upwards, and in the other downwards. The second 
pair of antennee are slender, cylindrical, not longer than the 
superior, articulations variable. The gnathopoda are subequal, 
small. The first two pairs of pereiopoda robust, subequal. 
The third and fourth pair subequal, longer than the preceding, 
but not more than one-third; propodos having the anterior 
margin fringed with fine rows of short teeth. The posterior 
pair of pereiopoda are scarcely half the length of the pre- 
ceding. The pleopoda are subequal, reaching beyond the 
extremity of the telson, having the approximate margins only 
of the rami fringed with short strong spines. Colour reddish 
orange spotted with black. 
Hitherto the species of this genus have been taken only 
as pelagic in tropical or subtropical latitudes. It is an 
interesting fact that this species should have been taken off 
the coast of Banff, from whence it was sent to us by that very 
successful observer, Mr. Edward, who in writing says: “1 can 
say little as to its habits. I took eleven, and kept a few alive 
for a short time, but observed nothing in their manners beyond 
that which may be seen in the majority of species. I supplied 
them with plenty of sand, and also a few marine plants, but 
they neither seemed to be burrowers nor climbers, as they 
never went into the one nor appeared to care for the other. 
They, however, swam a little. This they do somewhat after 
the manner of Callisoma crenata ; OY, in other words, they rise 
gradually from the bottom until they reach the top; then 
putting on more power, they dash round and round the vessel. 
With close observation I observed that the superior antenns 
were kept pretty well up and very widely apart, whereas the 
inferior were always directed downwards. All the legs were 
kept doubled up. I never saw them stretched out. They 
would then sink once more to the sand at the bottom. Here 
they would rest, sometimes a few minutes, sometimes longer, 
