Top left panel: comparison of the widths of the super profiles from the approaching and receding sides of the galaxies. The largest of each of these velocity dispersions is represented by σ _large and the smallest one by σ _small. The dashed line represents the line of equality. Top right panel: histogram of the difference between the velocity dispersion derived from the approaching and receding halves of the galaxies. Bottom left panel: narrow component velocity dispersion as a function of the amplitudes of non-circular motions, , derived by Trachternach et al. (2008). Bottom right panel: broad component velocity dispersion as a function of . Note that only the 18 galaxies that are part of Trachternach et al. (2008) sample are shown here. Symbols are as in Figure 8.