Distributions of various parameters, including the 44 RSCGs in CfA2+SSRS2 with cz > 2300 km s⁻¹ not included in this study (solid line) and the 14 RSCGs observed here (dashed line): (a) redshift or velocity, (b) RSCG population, (c) velocity dispersion, and (d) environment overdensity, ﹩\langle \rho _{\mathrm{env}\,}\rangle /\langle \overline{\rho }\rangle ﹩, as calculated in Barton et al. (1996).