Entozoa

Entozoa, a term once used to include those worms which are internal parasites, such as the Flukes, T?/peworms, Hair Worms, etc. As, however.

the adoption of this division necessitated the division of such a class as the Nematoids or thread worms, it has been abandoned. [Fluke, Tapeworm, Acanthocephala, and Nematoidea.]