16 
HISTORY OP BRITISH CRUSTACEA. 
dantly in deep water on the coast of South Devon and Corn- 
wall. In Scotland it is taken occasionally in the Moray 
Birth 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. ACHiEUS, 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. 
Bore 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^eus Cranchii, Leach. CrancJis 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. 
