  It has been suggested that the peanut-shaped bulges seen in some edge-on disk
galaxies are due to the presence of a central bar. Although bars cannot be
detected photometrically in edge-on galaxies, we show that barred potentials
produce a strong kinematic signature in the form of double-peaked line-of-sight
velocity distributions with a characteristic ``figure-of-eight'' variation with
radius. We have obtained spectroscopic observations of two edge-on galaxies
with peanut-shaped bulges (NGC~5746 and NGC~5965), and they reveal exactly such
line-of-sight velocity distributions in both their gaseous (emission line) and
their stellar (absorption line) components. These observations provide strong
observational evidence that peanut-shaped bulges are a by-product of bar
formation.
