The ornamental design for an exteriorshell of a trunk door of a cartopcarrier, as shown and described.
FIG. 1 is a top plan view of a trunk door for a car top carrier or similar
article showing my new design, the fragmentary broken line representation
of a car top carrier being only for purposes of illustrating environmental
features and forms no part of the claimed design;
FIG. 2 is a right side elevational view thereof, the left side elevational
view being a mirror image of the view of FIG. 2; and