  Complementary one-, two-, and three-dimensional tests for detecting the
presence of substructure in clusters of galaxies are applied to recently
obtained data from the 2dF Galaxy Redshift Survey. The sample of 25 clusters
used in this study includes 16 clusters not previously investigated for
substructure. Substructure is detected at or greater than the 99% CL level in
at least one test for 21 of the 25 clusters studied here. From the results, it
appears that low richness clusters commonly contain subclusters participating
in mergers. About half of the clusters have two or more components within 0.5
h^{-1} Mpc of the cluster centroid, and at least three clusters (Abell 1139,
Abell 1663, and Abell S333) exhibit velocity-position characteristics
consistent with the presence of possible cluster rotation, shear, or infall
dynamics. The geometry of certain features is consistent with influence by the
host supercluster environments. In general, our results support the hypothesis
that low richness clusters relax to structureless equilibrium states on very
long dynamical time scales (if at all).
