Seashells: the plainness and beauty of their mathematical description

Examples: Gastropods

Turritella (corkscrew shape, [2, p. 48])

[alpha=88.9, beta=4, phi=55, mu=1, Omega=-2, A=22.2, a=1.3, b=1.5, L=0]

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Very attractive by their slender proportions and elegance, the turritellas differ from other families of shells mainly by their long and pointed spire with many whorls, no umbilicus and a horny operculum.
Habitat: sand in both shallow and deep water. These species can be found all over the world.

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

Last update: 08 Apr 23:40:25 2006

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