CLASS V. ORDER III, 93 
Hiruno, (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. 
Gonrpius, (hair-worm, hair-snake,) body round, 
filiform, equal, smooth. In water and damp pla- 
ces, 
