220 
GAMMARIM. 
produced, the finger being rudimentary. In the more 
robust second pair the wrist is as long as the hand, 
which is produced and somewhat dilated towards the 
inferior angle of the distal extremity ; the finger is 
small, subapical, and impinges against the hand so as 
to form an imperfectly chelate organ. The coxa of the 
fourth pair of legs has the upper portion of the pos- 
terior margin excavated, to receive the anterior lobe 
of the fifth pair of legs. The coxae of the last two 
pairs of legs are produced infero-posteriorly to an angle ; 
the thigh of the last pair has the lower half of the 
posterior margin deeply serrated. The last three pairs 
of caudal appendages are subequal in length, and ter- 
minate in equal styliform branches. The terminal plate 
is emarginate at the apex. 
The colour of the animal appears to vary, but we are 
inclined to believe that it deepens in hue as it increases 
in age. The colour at first is yellow, with a few scat- 
tered cells of black pigment ; these increase in number 
and dimensions until the animal becomes quite black. 
It has been sent to us from Tenby, where it was 
dredged by Mr. W. Welsh ; from the Moray Frith, 
where it was taken by Mr. Gregor ; Mr. Barlee also 
took it in the Shetlands and Loch Fyne. In Belfast 
Bay it was dredged in twenty fathoms by Mr. Thomp- 
son ; and we have dredged it on the north-west of 
Drake’s Island in Plymouth Sound. 
