| 1. | Umbilicus, become much less prominent and are no longer nodose.
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| 2. | Its periphery is smooth or nodose, angulate or keeled.
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| 3. | And in this strongly nodose variety the incremental striae are usually inconspicuous.
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| 4. | Later whorls have a nodose keel bordered by furrows.
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| 5. | The cell bodies of inferior ganglion of the vagus nerve ( nodose ganglia ).
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| 6. | Finally, the border of r7 that is not in contact with r6 gives rise to the jugular / nodose ganglia.
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| 7. | The body whorl is axially sculptured with12 nodose and rounded ribs, the second whorl 15, the third whorl 16.
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| 8. | The wing venation is distinctive in that the veins in the anal region are nodose, and the costal area has numerous cross veins.
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| 9. | Characteristics of this species are : the whorls are divided by a nodose keel into a larger convex upper portion and a smaller channelled lower part.
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| 10. | Shells tned to have subquadrate whorl sections as in " Durgaites " and " Kyserlingites " and to be strongly ribbed or nodose or both.
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