Alycaeus eydouxi is a species of small land snails with a gill and an operculum, terrestrial gastropod mollusks in the family Alycaeidae.
Protoconch matte, without spiral lines. The region from the beginning of the teleoconch to the beginning of the differently ribbed region where the sutural tube lies, consists of fine, dense, rather regular ribs with weak spiral striation; the next region of the shell extending to the constriction is long, with dense, lamellae-like, elevated ribs, which are most elevated closer to the suture. Below the ribs, the microtunnels are visible as narrow light bands between the darker, thicker stripes (visible where there are weathered areas of the shell). [1]