CLASS V. ORDER III. 93 



HIRUDO, (leech, blood-sucker,) body oblong, 

 truncate at both ends, unarmed, cartilaginous ; 

 moves by dilating head and tail and contracting 

 itself into an arch. In water and damp places. 



GORDIUS, (hair-worm, hair-snake,) body round, 

 filiform, equal, smooth. In water and damp pla^ 

 ces. 



