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 ch elate 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 infer o-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. 



