Perimangelia interfossa

Perimangelia interfossa is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.

Description
The solid shell is dark reddish brown. It contains 8 whorls, with 8-10 strong longitudinal ribs, and 10-12 threadlike, darker colored revolving ribs in the interspaces only. The outer lip is simple and somewhat thickened.

Distribution
This marine species occurs off Northwest USA.