  New simulations are reported of a single bilayer immersed in a liquid
solvent, using a simple extension of the model of the Max-Plack group and of
model used in earlier work. Fluctuation spectrum vel structure factor is
dissected in detail and the role of bulk fluctuations is revealed.We propose to
search for protrusions direcdtly where they are, i.e. at the solvent-heads
boundary. In this context new single-point quantities and new two-point
correlations are introduced and determined for the solvent-head pairs. Most
unusual shapes are obtained.

Soft Condensed Matter;Statistical Mechanics