osiowe żebra

The axial ribs are dominant in the sculpture of the shell.

On the later whorls the axial ribs become quite obsolete.

In some specimens, the cords are large with occasional low and broad axial ribs.

They are marked by strong axial ribs, of which about 20 occur upon all the whorls.

It is marked by feeble extensions of the axial ribs.

The sculpture of the shell shows prominent axial ribs with a polished surface.

They are marked by rather slender axial ribs, of which 20 occur upon all the turns.

Usually it is quite elongated, with strong axial ribs.

They are marked by the continuations of the axial ribs.

The surface of the shell is marked by strong axial ribs.