FIG. 1 is a front, top and left side perspective view of an auxiliary toilet seat for a child showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a right side elevational view thereof, with the seat element in folded down position; and

FIG. 8 is a perspective view taken from the top, front and left side thereof.

The broken line representation of a toilet in FIG. 8 is for purpose of illustration only and forms no part of the claimed design.