122 UNIVALVES. 



the respiratory organs. Limpets are generally 

 found attached to rocks, sea-weed, and other 

 marine substances ; and in such numerous clus- 

 ters that the stones appear quite studded with 

 them ; they adhere with considerable tenacity, 

 and are not easily displaced. The animals fix 

 their shells thus securely, by first applying their 

 fleshy foot and the edge of their mantle to the 

 substance on which they take up their abode; 

 and having formed an internal vacuum by the 

 contraction of their muscles, the pressure of 

 the external air keeps them firmly fixed to the 

 spot. Thus adhering to a solid basis, and pre- 

 senting a shell whose conical form is well calcu- 

 lated to break the force of the rough winds and 

 dashing waves, this little animal in its exposed 

 situation, exhibits a striking instance of the wise 

 provision of the Almighty for the protection of 

 his creatures. This genus is found in all parts of 

 the world, but abounds particularly in the Island 

 of Cyprus. Its name signifies a little dish, an 

 appellation suggested by its form. The animal 

 feeds on sea-weed and marine vegetables. The 

 manner in which the Limpet attaches itself to 

 the rocks and thus seeks shelter, is beautifully 

 described and applied in the following verses ; 



' In Nature's all-instructive book, 

 Where can the eye of reason look, 

 And not some gainful lesson find 

 To guide, and fortify the mind ! 



