My thanks to Kirt Onthank for providing me the preserved specimens photographed on this page. Notice the thin, yellowish, easily-cracked periostracum. The aperture is approximately half the length of the shell.
This closeup of the aperture on a preserved sample shows the horny operculum and the concave columella. The tip of the incurrent siphon is visible near the broad siphonal canal at the lower right.
The protoconch (left) is mostly worn away. Note the spiral ridges (cords) and the thin axial growth lines on the teleconch whorls (middle and right). The whorls are rounded or have a slight shoulder.
