376 
GAMMARIDiE. 
flagellum is not longer than the peduncle ; the secondary 
appendage is also short. The inferior pair are some- 
what longer than the superior, a circumstance that 
induces us to believe that the latter have been shortened 
by accident, since they are longer in the specimens which 
we have considered to belong to this species, and also 
generally in the genus ; in fact, we only know of two 
species, G. Caspius and G. Atchensis, of Brandt, that 
have the superior antennae shorter than the inferior. 
The hands are nearly of one size and ovate. The second 
and third segments of the tail are infero-posteriorly pro- 
duced to a point. The posterior pair of caudal ap- 
pendages reach much beyond the preceding two. The 
branches are unequal, the inner being about half the 
length of the outer, and both are fringed with short 
obtusely -pointed spines. The central tail-piece is 
double. 
We have taken our description and figure from one 
of the specimens preserved in the British Museum, 
which are those from which Dr. Leach originally defined 
the species, and which were found by him in the sea near 
Loch Ranza in the Isle of Arran. Our friend, the late 
Mr. Barlee, sent us some from the Shetlands. And it 
appears to us that the sigmoid form of eye is not to be 
depended upon, for many of the specimens differ in no 
respect from the others except in the crooked eyes. 
The probability therefore is, that the crooked eye is 
an abnormal form, and not the true condition of the 
organ. 
Thompson, in his Natural History of Belfast, states 
that it has been found by Mr. Hyndman and himself, 
at Belfast, in the tidal river Lagan above the bridge at 
high water. 
This species appears to be a form intermediate be- 
