ftot the case. For about the time of casting their shell, 

 the stones break through the internal coat of the 

 stomach, and being thrown by the three serrated teeth 

 therein, become dissolved in the space of a few 

 days, which makes it difficult to fiud them just at this 

 time. 



They eat their old shells immediately after shed, 

 ding them. Perhaps these stones may be designed to 

 furnish new petrescent juices to its fluids, for the 

 re-production of their annual dress 



As tw turbinated shell-fish of the snail-kind, \?e 

 may first observe the snail itself. This is surprisingly 

 fitted for the life it is to lead. It has the organs of 

 life in a manner almoit as complete as the largest ani- 

 mal; a tongue, brain, salival ducts, glands* nerves^ 

 stomach, and intestines; liver, hi art, and blood ves- 

 sels : besides this it has a purple bag that furnishes 

 a red matter to different parts of the body, toge- 

 ther with strong muscles, that hold it to the shell, 

 and which are hardened like tendons at their inser. 

 tion. 



But these it possesses in common with other animals. 

 We must now see what it has peculiar to itself. The 

 iirst striking peculiarity is, 4t has got its eyes on the 

 points oi i:s largest horns. Whea the snail is in mo- 

 tion, four horns are tfeen distinctly : but the two lon- 

 gest deserve peculiar consideration, both on account 

 of the various motions with which they are endued 3 

 and of their having eyes at the extreme ends of them. 

 These appear like two blackish points. The animal 

 can direct them to different objects at pleasure, by a 

 regular motion out of the body; and sometimes it 

 hides them by a- very swift contraction in<o the belly. 

 Under th'e small horns is the anim il's mouth ; and 

 though it may appear too soft a substance to be fur. 

 mshed with teeih, yet it has nj less than eight of 

 them, with which it devours leaves ftlid other 5ttbstaii 

 ces seemingly harder* than itself* 



