  We summarize here the first results of a new spectroscopic survey of galaxies
in the Coma cluster with -20.5 < M_B < -14. Differences between the last epoch
of star formation (SF) activity in S0 and elliptical galaxies are discussed.
Furthermore, we show that about half of all galaxies without present-day SF
display signs of activity at z < 1-2. Systematic trends of most recent SF epoch
with galaxy luminosity are presented.
