THE WORMS 65 
68. Egg-laying.—The eggs of some leeches are stored 
up in a cocoon like that of the earthworm, which is attached 
to submerged plants or placed under stones. When the 
young are able to lead independent lives they emerge with 
the form of the parent. A leaf-like form, Clepsine, some- 
times found adhering to turtles, fastens the eggs to the 
under side of its body, and the young when hatched 
remain there for several days, adhering by their posterior 
suckers. 
