| 11. | The protoconch contains 1.5, well rounded, smooth lip.
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| 12. | Their protoconch morphologhy seems to infer a non-planktotrophic larval development.
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| 13. | It contains 8?whorls of which six form the protoconch.
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| 14. | There is no shell, no protoconch and no longer any supporting tissue.
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| 15. | The protoconch is smooth, heterostrophic and obliquely immersed in the succeeding whorl.
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| 16. | The morphology of the protoconch is usually very helpful as a taxonomic character.
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| 17. | The protoconch is rounded, and presents two whorls.
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| 18. | Sculpture : The smooth protoconch consists of 1?whorls.
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| 19. | The shell consists of 10 whorls, of which two include the protoconch.
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| 20. | The acute protoconch is polished, whitish and smooth.
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