Design for a ciborium or reliquary (?)

Design for a ciborium or reliquary (?), consisting of a sort of bowl with straight sides and chamfered corners, and a base; at the front, on the wall, a bishop is depicted in a medallion; the bowl is closed off with a semi-circular lid on which stands a cylindrical box, as it were, with a pelican and a cross on top. At the bottom, in the base, a sheaf of corn is depicted.