The last whorl is acutely angulate posteriorly, and the spire is tabulated, giving to the shell a peculiar truncate appearance.

Aperture oblong, entire, angulated below; peristome incomplete, thin, even-edged.

They were perfect masterpieces of the sailmaker's art, the jibs being angulated, and the mainsail, square-headed gaff-topsail, and trysail being made with gored cloths.