Left side-view. Apical spiral protoconch, with spire inclined away to right side of shell, enlarged to show former shape (white dots), now part- dissolved by lappets of growing siphon. Protoconch entirely lost at later stage.
Left side-view. Apical spiral protoconch, with spire inclined away to right side of shell, enlarged to show former shape (white dots), now part- dissolved by lappets of growing siphon. Protoconch entirely lost at later stage.