  We combine photometry and lens modeling to study the properties of 17
gravitational lens galaxies between z=0.1 and 1. Most of the lens galaxies are
passively evolving early-type galaxies, with a few spirals. The colors, scale
lengths, and ellipticities of lens galaxies are similar to those of the general
population of early-type galaxies, although there may be a deficit of
apparently round lens galaxies produced by the inclination dependence of
lensing cross sections. The projected mass distributions are aligned with the
projected light distributions to <~ 10 deg, except in the presence of a strong
external tidal perturbation, suggesting that dark matter halos have orbits that
are significantly modified by interactions with the baryonic component and are
not far out of alignment with the stars. Lens galaxies obey image
separation/lens luminosity correlations analogous to the Faber-Jackson and
Tully-Fisher relations, which are consistent with standard dark matter lens
models. The lens galaxy mass-to-light ratios decrease with redshift as d(log
M/L_B)/dz = -0.3\pm0.1 (-0.5\pm0.1) for Omega_0=1 (0.1), thus providing direct
evidence of passive evolution for a sample of early-type galaxies in
low-density environments. The evolution-corrected mass-to-light ratios are
generally larger than predicted by constant M/L dynamical models, although
there is significant scatter; with improved photometry, lens galaxy
mass-to-light ratios would better distinguish between constant M/L and dark
matter models. These conclusions are limited primarily by the quality of lens
galaxy photometry.
