Illustration of our particle tracking scheme. The example shown here is intended to be demonstrative of our scheme and does not represent actual data from a simulation. Each circle represents a gravitationally bound clump. Red corresponds to a new clump, gray to a previously found clump that was identified again, white to a clump that was not found (but will continue to be looked for in future frames), and blue to a new clump that formed from a split. Clumps are consistently labeled from frame to frame. Clumps that merge are given two labels and are continued to be tracked as both clumps. In taking statistics, we use the masses of all of the red clumps.