  Properties of 53 globular cluster systems are investigated. Strong
correlations are found between parent galaxy luminosity and both the slope of
the radial density profile for clusters and the width of the cluster color
(metallicity) distribution. These correlations are in the sense that the most
luminous early-type galaxies are embedded in cluster systems that have the
shallowest radial gradients and exhibit the broadest color distributions. The
data suggest a scenario in which luminous early-type galaxies have a more
complex evolutionary history than fainter ones. A problem with the
interpretation of the present data is that it is difficult (or impossible) to
disentangle the strongly correlated effects of high parent galaxy luminosity,
presence of a core or boxy isophotes, and shallow radial cluster density
gradients.
