The sculpture consists of oblique rounded and strong axial ribs, beginning at the angle of the shoulder, and extending to the suture below.

The whole surface, and especially the interstices, are very distinctly striated by fine flexuous growth lines, crescent-shaped on the smooth depression of the shoulder.

The aperture is oblique, narrowly ovate, produced below into a short straight and widely open siphonal canal, sinuated at the base.

The outer lip is convex, a little contracted below, thickened inside, with a rather deep and narrow sinus above, its margins thickly callous.

The inner lip is smooth, broad, and thick, extending over the parietal wall, which has a prominent tubercle margining the sinus.