Size: Up to 15mm high; 6mm broad Shape: Relatively tall shell with the last whorl making up about 60-65% of the total shell height. Has a siphonal canal and broad anal siphon. Colour: Usually chocolate brown with a purplish cast and usually darker towards the apex. Sculpture: 9-11 costae on each whorl, except the last where they die out towards the aperture and the base. 30 small spiral ridges on the last whorl (15 on previous one). Animal: White with whiter marks. Eyes are close to the tips of the cephalic tentacles. No operculum on foot.
Lives on sandy bottoms from very low shore to 100m.
Rare records from a round the UK from western Scotland, Isles of Scilly, Plymouth and the Channel Islands.