The ornamental design for an individual sampletray, as shown and described.
FIG. 1 is a top perspective view of an individual sample tray, showing our new design;
FIG. 2 is a bottom perspective view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a front elevation view thereof;
FIG. 5 is a left elevation view thereof;
FIG. 6 is a right elevation view thereof;
FIG. 7 is a top plan view thereof; and,
FIG. 8 is a bottom plan view thereof.
The broken lines depict portions of the individual sample tray that form no part of the claimed design. The small circular features shown in FIGS. 2, 7, and 8 depict environmental subject matter and form no part of the claimed design.