Spirals in Nature
Cyclones
in general have the shape of
equiangular spiral.
In general, Spiral-shaped growths in nature are mathematicaly
equiangular spirals.
More photos of seashells at
Beautiful Seashells Exhibition.
Man-Made Spirals
Such a spiral in ornament is called a volute.
See Also
Math of Seashell Shapes
.
Archimedes' spiral,
Clothoid,
Lituus,
equiangular spiral.