Notwithstanding the divisions of Lamarck, its species are numerous; the shells are terrestrial, and found in all parts of the globe; some are rare and beautiful.
The term Helix was given to this genus from the spiral form of the shell.
Shell extremely variable in form, generally globular, sometimes ventricose, conoid, never turriculated; summit constantly obtuse and rounded; aperture generally of a medium size, but sometimes very large or very small, always modified by the turn of the spire; oval, semilunar, more wide than long, edges disunited, entering but very little into the formation of the interior; the right lip or margin thickened or reflected.
Helix vesicalis.
H. algira.
H. pomatia.
H. aspersa.
H. vermiculata.
H. alonensis.
H. lineolata.