  We study the evolution of galaxies in clusters by the analysis of a sample of
about 3000 galaxies, members of 59 clusters from the ESO Nearby Abell Cluster
Survey (ENACS). We distinguish four cluster galaxy populations, based on their
radial and velocity distributions within the clusters. Using the class of
ellipticals and S0's (excluding the very bright ellipticals), we determine the
average cluster mass profile, that we compare with mass models available from
numerical simulations. We then use this cluster mass profile to solve for the
anisotropy profiles of the three other cluster galaxy populations, viz. the
very bright ellipticals, the early spirals, and the late spirals with the
emission-line galaxies. We discuss the implications of our findings for the
evolution of cluster galaxies.
