axial rib

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

They are marked by the continuations of the axial ribs.

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

On the later whorls the axial ribs become quite obsolete.

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.

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

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

The shell is sculptured with fairly regular, strong, curved axial ribs.

The aperture is large, broadly ovate, showing the axial ribs within.

The outer lip is strong, rendered decidedly sinuous by the axial ribs.

The surface is marked by weak axial ribs that are mostly shown in the earlier whorls.

The axial ribs continue weakly over the base.

It is marked by the continuation of the axial ribs, which become evanescent before reaching the middle.

There are axial ribs especially on upper whorls.

The early ones are marked by moderately strong, broad, low, almost vertical axial ribs, which become quite obsolete on the last turn and a half.

It is sculpted with axial ribs and with a single spiral on periphery.

They are marked by rather poorly developed, almost vertical, axial ribs, which become obsolete on the later whorls.

They are marked by almost vertical axial ribs, which become slightly expanded and flattened at the summits.

These whorls are marked by slightly sigmoid, oblique, axial ribs.

They are ornamented by well rounded, strong, almost vertical axial ribs, which become weakened toward the summit.

The axial ribs are very strong on the first 11 whorls, less so and more rounded on the remaining.

They usually have strong axial ribs.

They are marked on each whorl by 18 narrow, well developed, rounded, almost vertical axial ribs.

The axial ribs are strong, sublamellar, and shouldered a little below the summit.