| 1. | Its colour is uniform white, or white with narrow ochraceous spiral lines.
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| 2. | Pipe spiral lines starting from the center of the cake.
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| 3. | The surface is somewhat glossy, with faint, fine growth-lines and barely perceptible spiral lines.
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| 4. | Spiral bevel gears have their teeth formed along spiral lines.
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| 5. | It traced a clear sound-modulated spiral line through a thin black coating on a glass disc.
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| 6. | The numerous narrow red spiral lines are characteristic.
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| 7. | The intercostal spaces are smooth or crossed bv more or less distinct, incised, sometimes raised, spiral lines.
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| 8. | The outer lip is thin and is joined by the body whorl above the upper spiral line.
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| 9. | Some brown spiral lines, especially those at the periphery, may be represented by separate streaks which curve axially.
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| 10. | A second slightly gemmed thread appears on the body whorl, and 2 fine spiral lines on the anterior tabulation.
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