  We use cosmological hydrodynamic simulations to investigate formation of
galactic bulges within the framework of hierarchical clustering in a
representative CDM cosmological model. We show that largest objects forming at
cosmological redshifts z~4 resemble observed bulges of spiral galaxies or
moderate size ellipticals in their general properties like sizes, shapes, and
density profiles. This is consistent with observational data indicating the
existence of ``old'' bulges and ellipticals at more moderate redshifts. These
bulges are gas dominated at redshift z=3, with high rates of star formation and
would appear to be good candidates for small blue galaxies seen in the Hubble
Deep Field.
