• Limax is a genus of air-breathing land slugs in the terrestrial pulmonate gastropod mollusk family Limacidae. The generic name Limax literally means "slug".

• Some species, such as the leopard slug (L. maximus) and the tawny garden slug (Limacus flavus), are considered serious garden pests.

• The genus Limax sensu stricto is probably monophyletic. This genus is native to Europe, but at least one species (L. maximus) has been introduced into North America.