SHELLS AND MOLLUSCOUS ANIMALS. 217 



against this little animal, were most unfounded, 

 for the sea-hare is guiltless of either intent or 

 power to injure, though, like the cuttle-fish,^ it has 

 a means of defence against its enemies, in the 

 dark purplish liquid with which it can surround 

 itself, when threatened with danger, or when 

 caught by the fishermen. 



Our engraving represents a shell which is also 

 very frequent on some parts of our island, and 



commonly called the Torbay night-cap, or Hun- 

 garian bonnet (Pileopsis ungarica). It fastens 

 itself to rocks or stones, like the limpet, delving, 

 by some mysterious means, a cavity in the sur- 

 face. This shell is usually about two inches in 

 diameter, covered with a fawn-coloured skin, and 

 inside very smooth and glossy, of a white or rose 

 colour. 



The shells hitherto described are without a 

 regular spire, but many of the univalves are tur- 

 binated or spiral shells, like that of the common 

 periwinkle (Turbo littoreus}. This shell-fish, Le 

 Vogneau of the French, is too well known to 

 require any description. It abounds on rocky 



