16 HISTORY OF BRITISH CRUSTACEA. 



dantly in deep water on the coast of South Devon and Corn- 

 wall. In Scotland it is taken occasionally in the Moray 

 Pirth and on the coast of Berwickshire. 



Mr. Thompson,* of Weymouth, describes it when alive 

 as being of a lovely pink or puce colour. The ova are of a 

 light orange-brown. 



Gen. 2. ACH^EUS, Leach. 



Beak very short. Outer antennae with the first joint 

 united to the front, and extending beyond the inner canthus 

 of the eyes ; the second joint inserted on the sides of the 

 beak, and completely exposed from above. Third joint of 

 the jaw-feet longer than wide, and nearly triangular, the 

 fourth joint springing from its anterior and outer angle. 



Pore legs slender and short, the other pairs filiform, the 

 second ending in a straight, long nail ; the terminal joint of 

 the four last is large, compressed, and falciform. Abdomen 

 in both sexes of six joints. 



Ach^us Crancrti, Leach. Cranctis Spider Crab. — Ca- 

 rapace with two tubercles in the median line. Abdomen in 

 male and female six-jointed. 



* Ann. Nat. Hist. 1853, xii. p. 68. 



