Stylommatophora is an order of air-breathing land snails and slugs, terrestrial pulmonate gastropod molluscs. This taxon includes most land snails and slugs. Stylommatophorans lack an operculum, but some close their shell apertures with temporary "operculum" (epiphragm) made of calcified mucus. They have two pairs of retractile tentacles, the upper pair of which bears eyes on the tentacle tips. All stylommatophorans are hermaphrodites.
Stylommatophora
Cornu aspersum (common garden snail)
Cepaea hortensis, within the Helicoidea.
An individual of Trochulus hispidus, a stylommatophoran land snail in the family Hygromiidae within the Helicoidea.
A land snail is any of the numerous species of snail that live on land, as opposed to the sea snails and freshwater snails. Land snail is the common name for terrestrial gastropod mollusks that have shells. However, it is not always easy to say which species are terrestrial, because some are more or less amphibious between land and fresh water, and others are relatively amphibious between land and salt water.
Helix pomatia, a species of air-breathing land snail used for escargot, is a little bit larger than the common garden snail.
Cornu aspersum (previously Helix aspersa) – the common garden snail – in Israel
Colonies of snails in Sicily
"The Teeth of a Snail" from Robert Hooke's Micrographia, 1665. This actually shows the jaw, against which the teeth on the radula act.
