Conical shell up to 12mm in height with about seven whorls. The shell is thin and semi-transparent and golden to reddish lustre. Shell surface is sculptured with 4 or 5 spiral ridges some of which have knot-like swellings. The animal possesses three pairs of epipodal tentacles.
- Conical shell with flat sides and a pointed apex
- Breadth approximately equal to height
- Shell has only 4 to 5 spiral ridges at the end of the last whorl
Lives on stones where it feeds on alcyonarians and hydroids.
A northern species, recorded from the British Isles (mainly in the north), the Northern Isles and coast of Norway.