Velocity maps (left), PV diagrams (middle), and lag profiles (right) for the galaxies of our sample. The size of the points in the middle column corresponds to the size of the Voronoi bins they represent. The red curves in the right column show the lag profile of our N-body simulation, scaled to the maximum rotation velocity and to the scale length of the galaxy; this profile corresponds to circular orbits in a steady axisymmetric potential. The solid blue lines and the dashed green lines in the right column show the measured lags above and below the midplane of the galaxy, with the direction indicated in the legend. The uncertainties of the two lag fits are shown in lighter colors. Directions on the sky are indicated in the plots.