Non Palliata

Non Palliata, a sub-order of mollusca belonging to the class Gastropoda (q.v.) and the sub-class Anisopleura. It includes those forms which have a slug-like body, and have lost both the mantle and shell of the ordinary mollusca. It includes the commonest of the group of "Sea-Slugs" and "Sea-Lemons," such as Doris, Elysia, etc. The members of the group are all marine, and are usually found crawling over pools and rocks in comparatively shallow water.