THE 



MEDICINAL LEECH. 



Generic Character, 



Body oblong, more or lefs depreffedj moving by 

 dilatation and contradion. 



Specific Character, &c. 



OLIVE-BLACK LEECH with fix yeliow-fer- 

 ruginous lines on the upper furface ; the 

 lower variegated with black and yellow. 



The MEDICINAL LEECH. 



THE 



HORSE LEECH. 



Specific Character, ^c, 



OLIVE-BROWN LEECH with an ochre-co- 

 loured marginal band. 



The HORSE-LEECH. 



