532 



Moflusca. 



THE SNIPE SHELL, (Murcx haustellus, or cornutus,) 



So called on account of the length of a prominency 

 coming out of the shell. It is surrounded with blunt 

 prickles, and the colour of the whole is elegantly varie- 

 gated. 



THE PERIWINKLE, (Littornia littorea,') 



Is too well known to require any description. It is 

 found in incalculable numbers all round the European 

 coasts, and captured in immense quantities as an article 

 of food. 



THE LIMPET. (Patella.) 



THE shape of this shell is pyramidal ; it adheres to the 

 rock with such strength, that it can only be removed 

 by means of a knife or a strong blow. The apex of the 

 shell is sometimes sharp, sometimes obtuse, and often 

 surrounded with points and sharp prickles. When 

 thoroughly cleansed the shell is generally of a beautiful 

 purple tint of great brilliancy, though the animal that 



