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Ram's Horn Shell
Spirula Lamarck 1799
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Freshwater and Marine Image Bank U Washington
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Freshwater and Marine Image Bank U Washington
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Shell of Spirula Peronii Lam:. 1895. Spirula.
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Freshwater and Marine Image Bank U Washington
Shell of Spirula Peronii Lam:. A, Outside view; B, showing last chamber and position of siphuncle