  Using two-dimensional velocity maps and I-band photometry, we have created
mass models of 40 spiral galaxies using the Milgrom relation (the basis of
modified Newtonian dynamics, or MOND) to complement previous work. A Bayesian
technique is employed to compare several different dark matter halo models to
Milgrom and Newtonian models. Pseudo-isothermal dark matter halos provide the
best statistical fits to the data in a majority of cases, while the Milgrom
relation generally provides good fits as well. We also find that Milgrom models
give mass-to-light ratios that roughly correlate with galaxy color, as
predicted by stellar population models. A subsample of galaxies in the Hydra
cluster follow a tight relation between mass-to-light and color, but one that
is significantly different from relations found in previous studies. Ruling out
the Milgrom relation with rotational kinematics is difficult due to systematic
uncertainties in the observations as well as underlying model assumptions. We
discuss in detail two galaxies for which the Milgrom relation appears to fail
and find that relaxing the assumption of constant stellar mass-to-light ratio
can maintain Milgrom models' viability.
