| 1. | There is also a terminal series of subquadrate dark fuscous dots.
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| 2. | The whorl section is subquadrate with a rounded venter.
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| 3. | There is a row of black subquadrate spots around the apex and termen.
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| 4. | Whorl section is subquadrate, slightly compressed, flanks slightly convex, venter rounded.
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| 5. | Whorl section is subquadrate, like " Pleuronautilus ", only depressed.
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| 6. | There is a blackish-grey subquadrate spot on the base of the costa.
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| 7. | There is a suffused dark fuscous subquadrate blotch on the middle of the dorsum.
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| 8. | The whorl section is subquadrate and compressed, so as to be narrower than high.
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| 9. | Whorls are compressed, subquadrate in section, higher than wide, with few narrow constrictions.
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| 10. | The whorl section is subquadrate, flanks slightly convex, venter broad with a median furrow.
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