1) Class 2) Class turbellaria 
• (n. pl.) An extensive group of worms which have the body covered externally with vibrating cilia. It includes the Rhabdoc/la and Dendroc/la. Formerly, the nemerteans were also included in this group.
Turbellaria is a class of free-living flatworms (Phylum Platyhelminthes). They live in water and damp conditions. The epidermis is glandular, ciliated and has a thin cuticle.
[n] - free-living flatworms
class Turbellaria noun free-living flatworms