ORDER TRACHELIPODA. 47 



The Mummy Puppet Shell, {Pupa mummia.) 



The Pupa mummia is found in the Antilles; it takes 

 its name from the singularity of its form, which very- 

 much resembles that of a mummy. 



The Pupa is essentially a land-shell, living among 

 grass, on stones, and sometimes in places much exposed 

 to the heat of the sun. The greater number of the 

 species, which are very numerous, are natives of tropical 

 countries; there are, however, several found in Germany, 

 and other parts of the Continent, but they are extremely 

 small. 



The Wood Snail, {Helix nemoralis.) 



The Snail (Helix) is an animal well known in every 

 part of the globe, and its species are still extremely 

 numerous, although many shells which belonged to this 

 tribe, under the Linnsean arrangement, have been placed 

 in other divisions. The head of the Snail is furnished 

 with two pair of tentacula, or feelers; these, unlike simi- 

 lar appendices in other Mollusca, are retractile ; that is, 

 they can be withdrawn into the body at the will of the 

 animal. The use of these tentacula is uncertain. At 

 the top of each of the longest pair we find a black spot; 

 these spots have been supposed to be the eyes of the 

 animal, and a celebrated anatomist says, that he has 

 discovered in them all the component parts of perfect 

 eyes. However this may be, the animal appears to use 

 thera rather as organs of touch than of sight. Some 

 writers suspect that the sense of smell resides in one 

 or both pairs of these appendages. 



The uses to which Snails are applied are not many; 



