I claim the ornamental design for a shelf with turntable, as shown and described.
FIG. 1 is a top perspective view of a shelf with turntable, showing my new design.
FIG. 2 is a top perspective view of the shelf with turntable, shown with environment of a leg support structure.
FIG. 3 is a front elevational view of the shelf with turntable.
FIG. 4 is a rear elevational view of the shelf with turntable.
FIG. 5 is a left side elevational view of the shelf with turntable.
FIG. 6 is a right side elevational view of the shelf with turntable.
FIG. 7 is a top plan view of the shelf with turntable; and,
FIG. 8 is a bottom plan view of the shelf with turntable.
The broken lines depict portions of the article that form no part of the claimed design. The broken lines in FIG. 2 show environment of a leg support structure forming no part of the claimed design.