The rotifers or wheel-animalcules are relatively small and beautiful organisms, rarely ever longer that a third of an inch. The rotifers make up a phylum of microscopic and near-microscopic pseudocoelomate animals. At first sight they they might be mistaken for one-celled animals, but the presence of a digestive tract and of reproductive elements soon dispels such a belief.

Rotifers

The rotifers or wheel-animalcules are relatively small and beautiful organisms, rarely ever longer that…