| 1. | The operculum is circular, multispiral, with a central nucleus.
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| 2. | They have a brown, entirely corneous, circular, multispiral lip.
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| 3. | The smooth nucleus consists of about one operculum is multispiral.
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| 4. | The operculum is small, dark brown, multispiral, and chitinous.
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| 5. | The operculum is circular, light brown, multispiral, and chitinous.
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| 6. | The multispiral operculum has an erect, calcified spiral lamella.
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| 7. | The operculum is multispiral with a thin, oblique lamella.
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| 8. | The operculum is roughly circular, light brown, multispiral, and chitinous.
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| 9. | The operculum is thin, amber, narrowly ovate, multispiral with eccentric nucleus.
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| 10. | The operculum is relatively large, roughly circular, pale brown, and multispiral.
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मोबाइल