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On penetration, they develop into another intermediate stage and produce thousands of cercariae—another larval stage, this one with a wormlike appearance.

If it successfully penetrates a snail, the miracidium reproduces asexually and produces thousands of new forms called “cercariae,” which then leave the snail and have 12 hours to find the final host.

Thus the cercariae, escaping from the snail find themselves on the grass whereupon they promptly drop their tails and stick themselves to the grass-blades.

The daughter redia or cercaria, as they are now termed, leave the body of the snail and finally become encysted on the stems of grass, cresses and weeds.

Thus the cercariae, escaping from the snail, find themselves on the grass, whereupon they promptly drop their tails and stick themselves to the grass-blades.