Distribution of the Local Void sample galaxies in the galactic longitude – radial velocity planes. a)−c) display the galaxies with galactic latitude −30° < b < 0°, 0° < b < 20° and 20° < b < 40°, respectively. The meaning of symbols are the same as in Fig. 1: filled circles represent galaxies in the IRAS PSCz catalog (Saunders et al. 2000) with radial velocities. Larger circles are the 50 Local Void sample galaxies in this study. Larger filled circles are for the 36 galaxies included in the final sample, and open circles are those not in the final sample.