SOWEKBY'S HIPPOLYTE. 285 



teeth, of which the anterior is almost as forward as the 

 apex, from which it is separated by a broad notch, which is 

 minutely toothed. There are also two teeth above each 

 orbit, and others on the margin of the carapace. The 

 scale of the external antennae extends beyond the rostrum, 

 and has a strong tooth on the anterior and outer margin. 

 Terminal filaments of the internal antennae very short, the 

 thicker one bent abruptly upwards at right angles to its 

 peduncle. Anterior feet not extending beyond the scale 

 of the external antennae ; the hands robust and rounded. 

 The second pair longer than the third, with the wrist 

 divided into about six distinct articulations. The abdo- 

 men is very gibbous, the third segment being strongly 

 carinated, the carina terminating in a strong posterior 

 tooth, standing over the middle of the fourth segment. 

 Middle scale of the tail with four pairs of small spines 

 above. 



Length about one inch and a half. 



I have thought it right to restore the specific name 

 given by Mr. Sowerby to this remarkable species, which 

 Leach adopted on no less than three occasions, and after- 

 wards altered without any sufficient reason. It is the 

 largest of our British species of Hippolyte. It is exclu- 

 sively a northern species, being found, according to Dr. 

 Milne-Edwards, in the seas of Iceland and Greenland. 

 Mr. Sowerby first described it from a specimen found 

 on the Scottish coast : the one figured by Dr. Leach 

 was obtained at Newhaven, in the Frith of Forth. I 

 have two fine and perfect specimens, which were kindly 

 given to me by Mr. M c Andrew, who procured them by 

 dredging in deep water off the Isle of Man. It is 

 not yet recorded as having been taken on the Irish 

 coast. 



