The ornamental design for a exteriorshell of a combined motor housing and mounting canopy for a ceilingfan, as shown and described.
FIG. 1 is a bottom and front perspective view of an exterior shell of a
combined motor housing and mounting canopy for a ceiling fan, showing my
new design;
FIG. 2 is an enlarged side elevational view thereof, the opposite side
being a mirror image of that shown; and,
FIG. 3 is an enlarged bottom plan view thereof.
The broken line showing of fan blades in FIGS. 1 through 3 are for
illustrative purposes only, and form no part of the claimed design.