The ornamental design for an apparatus for excrementdisposal, as shown and described.
FIG. 1 is a perspective view of an apparatus for excrement disposal showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a back view thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a bottom view thereof;
FIG. 6 is a left side elevational view thereof; and,
FIG. 7 is a right side elevational view thereof.
The broken lines in the figures are included for the purpose of illustrating portions of the apparatus for excrement disposal and form no part of the claimed design.