I claim the ornamental design for a lavatory, as shown and described.
FIG. 1 is a top perspective view of a claimed design;
FIG. 2 is a bottom perspective view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a bottom view thereof;
FIG. 5 is a front view thereof;
FIG. 6 is a rear view thereof;
FIG. 7 is a right side view thereof;
FIG. 8 is a left side view thereof; and,
FIG. 9 is a section view thereof taken along line 9-9 in FIG. 1.
The ornamental design which is claimed is shown in solid lines in the drawings. The broken lines and non-shaded areas in the drawings are for illustrative purposes only and form no part of the claimed design.