See list Tritia cuvierii, common name the one-banded nassa, is a species of sea snail, a marine gastropod mollusk in the family Nassariidae, the Nassa mud snails or dog whelks.

The spire is formed of six or seven indistinct whorls, often ornamented with longitudinal folds, which are rarely continued to the base of the body whorl, and which are crossed by very fine and slightly marked transverse striae.

The transverse striae are accompanied with very fine lines, white and of a red bay color.

Reddish, or bluish brown spots, intersected with white, form zones upon the upper part of each whorl.

[2] This species occurs in the Mediterranean Sea and in the Atlantic Ocean off the Azores.