  We show that the primordial density field imposes certain degree of coherence
in the orientation of density perturbations. We quantify the scale of coherence
and show that is significant on scales of at least $30-40h^{-1}$Mpc, being more
important in density fields with flat spectrum. Evidence is also presented that
the reason for this coherence is that the long density waves are the dominant
part of the superposition of waves which build the large-scale density peaks.
As a consequence of this, small-scale peaks tend to follow the configuration of
their host large-scale perturbations. Different types of alignments are
investigated. It is shown that alignment of the major axes of neighbouring
peaks is more prominent around the highest peaks than around the lower ones.
Alignments between the major axes of peaks and the radius-vector joining their
centre with the centre of a high peak were not observed. Evidence is presented
that peaks develop tails extending to neighbouring peaks, as predicted by Bond
(1987a, 1987b) and Bahcall (1987).
