Cyllene is a genus of sea snails, marine gastropod mollusks in the family Nassariidae, the nassa mud snails or dog whelks.

The spire is short, acute with the suture canaliculated.

The columella is concave, smooth or finely grooved.

The outer lip shows a slight sinus at the forepart and is emarginate posteriorly and grooved internally.

[2] Species within the genus Cyllene include: