  The Antennae is a pair of late type spirals in the course of merging. The
interaction triggered an ongoing strong burst of star formation that also
produced a large number of Young Star Clusters (YSCs), many of which seem to be
young Globular Clusters (GCs). The observed Luminosity Function of the YSC
system is a power-law. We use evolutionary synthesis models for star clusters
in comparison with HST WFPC observations of the YSC system in the Antennae to
analyse the mass function of this ${\rm \sim 2 \cdot 10^8}$ yr young star
cluster system. Properly accounting for age spread effects by individually
age-dating the YSCs we find that the intrinsic Mass Function (MF) is log-normal
in shape and in intriguing agreement with the MF of old GC systems. We discuss
this MF in the context of cluster formation and dynamical effects in the tidal
field of the parent galaxy and speculate about its future evolution.
