220 POPULAR CONCHOLOGY. 



a short channel at the base, and a notch at the 

 upper part of the right lip ; operculum small and 



norny. Animal, head furnished with a pro- 

 boscis, and having two tentacula distant from 

 each other, and eyes in the middle ; foot short 

 and oval. — 87 species recent, and 60 fossil.* 



The Mollusca forming these shells chiefly 

 inhabit the Indian and Pacific Oceans, the Red 

 Sea, &c. ; they appear to have the power of 

 remaining for a considerable period out of their 

 natural element, and without food, as has been 

 proved by the following fact : — Two speci- 

 mens belonging to one of the species of this 

 shell were brought from the Mauritius, and 

 contained the animals, which had drawn them- 

 selves far within the shell : they remained in 



* Or 220 (Deshayes). 



