88 Mr. Montagu's Description of several Marine Animals 



not be ascertained, nor the length of the antennee, the pe- 

 duncles of which only remain. 



I have since observed a specimen in the cabinet of Mr. Dono- 

 van, which, I am assured, came from the coast of Scotland. 



Cancer Astacus subteeraous. 

 Tab. III. Fig. 1. 2. 

 Body long ; thorax smooth, raised in the middle, surrounded 

 by a sulcus ; no proboscis, but two small, sub-pellucid, move- 

 able, angulated plates in front that cover the base of the an- 

 tennaj, through which are observed two contiguous, very minute 

 spots, supposed to be the eyes fixed within the shell : antenna? 

 four, pedunculated, inner pair bifid, scarcely longer than the 

 thorax; the outer pair considerably superior in length, setaceous: 

 the body consists of six smooth, glossy joints, spreading a little 

 in the middle; caudal fins five, broad, with a midrib, and ci- 

 liated : one arm extremely large, smooth, and glossy, exceeding 

 the size of the body, and nearly as long ; the first joint very 

 small, the second broader, and sloped off on the inner side to a 

 sub-arcuated edge, which projects into a hooked process at the 

 articulation with the first joint; the singular conformation of 

 this part is calculated to receive the end of the next joint when 

 folded, as represented by fig. 2 : the two extreme joints are very 

 broad, compressed, sub-marginated, and carinated ; fangs large, 

 the moveable one much hooked at the point, both destitute of 

 teeth, except a few faint crenulse scarcely discernible by the naked 

 eye: the other arm is invariably small, with a plain chelate hand 

 not of the same curious structure as the former : legs four pair, the 

 first with a broad chelate foot; the third and fourth are some- 

 what similar to each other, being furnished wHh a simple flat 



hirsute 



