06 



TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



ones will be found about the mouth on the under side. 

 The appearance of the edible crab (Cancer pagurus) and of 

 the common shore crab (Carcinus mcenas) are well known ; 

 and the figure shows, at 1 the " Fiddler " or swimming- 

 crab (Portunus puber) with flattened paddle-like hind legs, 



Fig. XVII. 



and at 2 one of the long-legged spider-crabs (Stenorhynchus 

 phalangium). Some of the spider-crabs are frequently 

 found to have their shells covered by a dense growth of 

 small sea-weeds, Zoophytes, and sponges, which to some 

 extent conceal the crab from observation when it is in a 



