| 1. | Whorl sections are subrectangular, sutures sinuous, the siphuncle subcentral.
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| 2. | As for all clymeniids, the siphuncle is along the dorsum.
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| 3. | The siphuncle in each is slightly removed from the ventral margin.
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| 4. | Members of the Trocholitidae vary in whorl section and siphuncle position.
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| 5. | The siphuncle is ventral and tubular . ( 1964 . ).
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| 6. | The siphuncle is narrow, located slightly ventral of the center.
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| 7. | The Siphuncle is large, displaced slightly ventral from the center.
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| 8. | The siphuncle, which is small, runs through the middle.
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| 9. | These are more continuous on the ventral side of the siphuncle.
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| 10. | In both the siphuncle is mostly composed of thin connecting rings.
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