Volvarina heterozona

The shell is vitreous white, thin, fragile, transparent, smooth and shiny.

There is in the middle of the body whorl a wide band of a pale yellow, continuing on the bead of the external edge.

The body whorl constitutes almost the entire shell, while the first three form, at the rear end, a small lowered summit.

The suture that separates them is obliterated by a coating which would make it impossible to follow its contour, without the presence of the small yellowish edging which we have pointed out.

Its outer edge, smooth and opaque, is lined on the outside with a wide longitudinal bead.