Alvania verrilli

Alvania verrilli is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.

Distribution
This marine species occurs in the lower Estuary of St. Lawrence

Description
The maximum recorded shell length is 2.9 mm.

(Original description) The white, solid shell is ovo-elongate. It contains 5 convex whorls. The protoconch is obtuse and smooth. The suture is deep. The aperture is sub-circular. The sculpture consists of, about 20 strongly prominent axial ribs, and a microscopically minute and close spiral striation. There is no umbilicus but only a minute umbilical split. The outer lip is thickened.

The peculiar fine spiral sculpture causes this species to be readily distinguishable.

Habitat
Minimum recorded depth is 180 m. Maximum recorded depth is 190 m.