Nautilus shell cross-section

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Nautilus shell cross-section

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Nautilus shell cross-section

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Nautilus shell cross-section

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Nautilus shell with iridescent interior

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spiny seashell close-up

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Nautilus shell cross-section

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Nautilus shell cross-section

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Nautilus shell cross-section

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Nautilus shell cross-section

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Nautilus Shell Interior

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X-ray of Seashell

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