Same as Fig. 3, but for observed galaxies in our sample. Circular velocities, V_c, e, are assumed to be equal to the characteristic rotation speed for galaxy discs (spiral symbols in Fig. 7) and are inferred from the Wolf et al. (2010) relation for ellipticals (circles). Halo masses for each of the three stellar mass bins highlighted in coluor are chosen from the M+18 abundance-matching relation, as shown by the starred symbols in Fig. 2. Coloured stars joined by a solid line indicate the ‘critical’ radius where the dark matter and stellar mass within the stellar half-mass radius are equal.