Abstract: An auxiliary shelving adapter for use with a shelving assembly having at least one structural shelf supported by shelf supporting members such as corner posts or rails. Each adapter includes a pair of hangers adapted to be suspended from the structural shelf in spaced relationship inboard of an adjacent pair of corner posts at one end of the assembly. In addition, each adapter has a horizontally-elongated bracket joined to the hangers and adapted to support one end of an auxiliary shelf beneath the structural shelf. Abutment elements disposed at the lower end of each adapter engage the inboard surfaces of a pair of end posts to brace the adapter, maintain it in a plane generally parallel with such end posts, and securely but removably hold the end of the auxiliary shelf against horizontal endwise movement.