The ornamental design for a bonemill, as shown and described.
FIG. 1 is a front perspective view of a bone mill of the present invention;
FIG. 2 is a front plan view of the invention illustrated in FIG. 1;
FIG. 3 is a left side view of the invention illustrated in FIG. 1;
FIG. 4 is a rear plan view of the invention illustrated in FIG. 1;
FIG. 5 is a right side view of the invention illustrated in FIG. 1;
FIG. 6 is a top view of the invention illustrated in FIG. 1;
FIG. 7 is a bottom view of the invention illustrated in FIG. 1; and,
FIG. 8 is a front perspective of the invention illustrated in FIG. 1 in another position.
The broken away symbols in the drawings indicate the appearance of any portion of the article between the break lines forms no part of the claimed design.