96 HIRUDINEA OR LEECHES. 



brane, which it lacerates. They have been found in the mouth, 

 pharynx, nasal fosste, larynx, and vagina. So much blood is 

 sometimes withdrawn that the animals are killed. 



The Medical Leech [H. nieilkinalis) used to be applied very 

 plentifully for bleeding, but now is seldom employed in this 

 country for that purpose. It is still bred in large numbers in 

 ponds in France, where it is fed by putting old horses into the 

 ponds, upon which they ravenously feed and soon kill. 



Land-leeches also occur in some regions, especially Ceylon. 

 Tennent, in his account of the island, tells us that he has seen 

 blood flowing over the edge of Europeans' shoes from their 

 innumerable bites. In England leeches are seldom troublesome 

 to any great extent. 



