  The growth of supermassive black holes (SMBHs) appears to be closely linked
with the formation of spheroids. There is a pressing need to acquire better
statistics on SMBH masses, since the existing samples are preferentially
weighted toward early-type galaxies with very massive SMBHs. With this
motivation we started a project aimed at measuring upper limits on the mass of
the SMBHs that can be present in the center of all the nearby galaxies (D<100
Mpc) for which STIS/G750M spectra are available in the HST archive. These upper
limits will be derived by modeling the central emission-line widths ([NII],
Halpha and [SII]) observed over an aperture of ~0.1" (R<50 pc). Here we present
our preliminary results for a subsample of 76 bulges.
