Galaxy type fraction vs. logarithm of mean sample mass for two stellar-mass-selected samples of J0152.7 cluster galaxies: those above and below 3.98 × 10¹⁰ solar masses (Holden et al. 2007). Error bars in galaxy type fractions are from Poisson counting statistics. More massive galaxies are considerably more likely to be E or S0 and less likely to be peculiar, compact, or merging than are low-mass galaxies.