Hylocelis is a genus of flatworm belonging to the family Cryptocelidae.

[1] Hylocelis is distinguished from other members of Cryptocelidae by the presence of tentacles, and tentacular and cerebral eye clusters.

The male copulatory apparatus has a seminal vesicle and a penis stylet.

The stylet is connected to the prostatic vesicle via a coiling ejaculatory duct.

The female apparatus has a vagina bulbosa and a Lang's vesicle.