The ornamental design for a hemisphericalscreen, as shown and described.
FIG. 1 is a perspective view of a hemispherical screen showing my new design;
FIG. 2 is a side elevation view thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a perspective view thereof in an opened position; and,
FIG. 7 is a perspective view of the hemispherical screen of FIG. 1 with the broken line showing of the structure supports and peripheral components removed.
The broken lines showing structural supports and peripheral components in each figure are for illustrative purposes only and form no part of the claimed design.