Seashells: the plainness and beauty of their mathematical description

Examples: Gastropods

Fool's Cap (capulus ungaricus, cap shape, [2, p. 54])

[alpha=43, beta=50, phi=-10, mu=1, Omega=-30, A=9, a=8, b=7, L=0]

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Although resembling limpets in shape, cap shells are less sturdy and their appex, which may be coiled, is often placed towarded the rear. Capulidae animals attach themselves to solid objects; some are parasitic on other mollusks. The fool's cap is a thin shell varying considerably in outline and height, usually wider than its height.
Habitat: solid objects, North Atlantic, Mediterranean.

[2] S. Peter Dance, Shells, Dorling Kindersley, 2002.

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