  We present V-band surface photometry and major-axis kinematics of stars and
ionized gas of three early-type spiral galaxies, namely NGC 772, NGC 3898 and
NGC 7782. For each galaxy we present a self-consistent Jeans model for the
stellar kinematics, adopting the light distribution of bulge and disc derived
by means of a two-dimensional parametric photometric decomposition. This
allowed us to investigate the presence of non-circular gas motions, and derive
the mass distribution of luminous and dark matter in these objects.
  NGC 772 and NGC 7782 have apparently normal kinematics with the ionized gas
tracing the gravitational equilibrium circular speed. This is not true in the
innermost region (r < 8'') of NGC 3898 where the ionized gas is rotating more
slowly than the circular velocity predicted by dynamical modelling. This
phenomenon is common in the bulge-dominated galaxies for which dynamical
modelling enables us to make the direct comparison between the gas velocity and
the circular speed, and it poses questions about the reliability of galaxy mass
distributions derived by the direct decomposition of the observed ionized-gas
rotation curve into the contributions of luminous and dark matter.
