| 11. | The umbilicus is partly or completely covered by the columella expansion.
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| 12. | The columella is vertical, a little twisted at the base.
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| 13. | It contains 11 columella is straight, with a thick callus.
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| 14. | It contains eight flattish columella show a thin layer of enamel.
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| 15. | The shell contains 7 gradate columella is ochre-tinged plain.
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| 16. | The columella was also used to make plummets or sinkers.
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| 17. | The columella is without folds ( teeth ) and straight and vertical.
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| 18. | The dark columella is brownish, curved in the middle.
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| 19. | The columella is anteriorly projected, and the siphonal canal is convex.
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| 20. | The nuclear columella is smooth, short and obliquely attenuated.
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