  In an ongoing effort to study the formation and evolution of galactic bulges
we have investigated the position of 19 bulges of type S0-Sbc on the
fundamental plane (FP). We find that bulges, both in B and K band, lie close to
but slightly below the FP defined by ellipticals and S0s, i.e. are slightly
brighter. There are hints that bulges of later morphological type are situated
below the other bulges in our sample. The FP results are consistent with the
picture, obtained from our recent analysis of HST-colours, that bulges are old,
except for the Sbc galaxies. The fact that bulges lie so close to the FP of
ellipticals and S0s implies that their formation epoch must have been similar,
at most about 2.5 Gyr earlier, than cluster Es and S0s, and and that the
surrounding disk does not significantly affect their structure.
