The ornamental design for a casketshellcorner, as shown and described.
FIG. 1 is a perspective view of my new, original and ornamental design for a casket shell corner;
FIG. 2 is an enlarged perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a side view thereof, the other side view being a mirror image of FIG. 4;
FIG. 5 is a top view thereof; and,
FIG. 6 is a bottom view thereof.
The broken line showing of the remainder of the casket is included for the purpose of illustrating environment and forms no part of the claimed design. The broken line adjacent to the shaded portion of the casket shell corner forms an unclaimed boundary of the design. The undisclosed portion of the casket shell corner forms no part of the claimed design.