Tritia varicosa
Tritia varicosa, common name the small dog whelk, is a species of sea snail, a marine gastropod mollusk in the family Nassariidae, the nassa mud snails or dog whelks.
Distribution
This species occurs in European waters, the Mediterranean Sea, the Northeast Atlantic Ocean.Description
The length of the shell varies between 5 mm and 8 mm.The shell is conic and whitish, marked with rufous and featuring two or three white varices. The seven whorls are flattish and decussate. The aperture is purple, toothed on each side, and the columella is white externally.
The shell is small, ovate-acute, ventricose, decussate, and appears reddish-ashy. It is adorned with tiny, numerous longitudinal costellae. The tail is short, and the outer lip is denticulate.