sentences:  Later the name "Arion distinctus" was used for the one of these species that Davies had provisionally called "form A".Mabille's original 1868 description of "A. distinctus" included details (coloration, date of collection) that tended to indicate this species rather than "Arion hortensis" s.s. No type survived, so a neotype has been designated, collected from the same rough locality (near Sèvres, Paris).As in other members of the genus "Arion", the pneumostome is in the anterior half of the mantle.