The ornamental design for a supplyspool for a fishing line, as shown and scribed.
FIG. 1 is a left side, top and front perspective view of a supply spool for
a fishing line showing our new design;
FIGS. 2 and 3 are, respectively, top and bottom plan view thereof;
FIGS. 4 is a front elevational view thereof, the rear elevational view
being a mirror image, and the side elevational view being identical to
FIG. 4; and
FIG. 5 is a vertical sectional view taken in the direction of the arrow on
the lines 5--5 of FIG. 3.