The ornamental design for a bag with skeletalcorners, as shown.
FIG. 1 is a front perspective view of a bag with skeletal corners showing a second aspect of our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is a rear perspective view of a bag with skeletal corners.
The broken lines showing a handbag, the face of the end caps and the companion end cap are for the purposes of illustrating environment and form no part of the claimed design.