 There are usually three cords on the early spire whorls, rather flat and as broad as the interspaces, later the second-order spiral threads are intercalated.The main spiral cords tend to form small knobs at their intersections with the axial folds, which are narrower than the interspace and may be wanting on part or whole of the spire.Body whorl is somewhat constricted around the canal, which is not delimited by a ridge.