- A genus of fresh-water leeches, furnished with a proboscis. They feed upon mollusks and worms.
- A genus of the purchase Hirudinea, including a few of the lower forms of leeches, when the sinus along with other vessels form a consistent system of cavities containing blood, plus in that the segmental organs available in to the sinuses by ciliated apertures. It's The typical genus of this family members Clepsinidæ. C. bioculata is a good example.