THE SLUG TRIBE. 537 



piration, the matter fixing on the surface of the 

 body, and afterward coming off in small threads. 

 In proof of this, if a leech be immersed in oil 

 (where it will keep alive for several days) and 

 afterward put into water, a kind of slough will be 

 seen to loosen from its skin, exactly of the shape 

 of the body. 



The Leech is a viviparous animal, producing one 

 young at a time, and this about the month of July. 

 If it be confined in a glass, and kept in a room, it 

 is said to shew itself very restless before a change of 

 weather. 



When it is applied in surgery, and is found to 

 adhere too long, it is easily removed by putting 

 upon it salt, pepper, or acids. 



THE SLUG TRIBE*. 



THE body of the Slug, or naked Snail, is oblong, 

 and has on its upper part a kind of fleshy shield ; 

 and below a flat longitudinal disk, by means of 

 which the animal has its progressive motion. On 

 the right side of the body there is an aperture. 

 Above the mouth are situated four feelers, at the 

 apex of each of the two larger of which there is 

 an eye. 



Few animals, for their size, are more voracious 

 than these. They would do serious injury to our 



* The Linnean order of Molluscous Worms commences here. 



