We have studied the evolution of galaxian morphologies from ground-based , good-seeing images of 9 clusters at z=0.09-0.25 .
The comparison of our data with those relative to higher redshift clusters ( \citeauthor Dress97 1997 , D97 ) allowed us to trace for the first time the evolution of the morphological mix at a look-back time of 2-4 Gyr , finding a dependence of the observed evolutionary trends on the cluster properties .