The ornamental design for a carton, substantially as shown and described.
FIG. 1 is a front elevational view of a carton showing my new design;
FIG. 2 is an elevational view looking from the left side of FIG. 1, the
right side being identical to the left side;
FIG. 3 is a rear elevational view; and
FIG. 4 is a top plan view thereof, the bottom being identical to the top.
The drawing has shading and partial shading to show color contrast. The
partial shading shown for black extends over the entire surface of the box
except for the circular design on the front which is colored as indicated
by the shading shown thereon.