  We present preliminary results of a neutral hydrogen (HI) redshift survey to
find low surface brightness (LSB) galaxies in the very nearby universe. Our
sample consists of all galaxies in the APM catalog (Maddox et al 1990) with a
mean surface brightness of mu > 24 mag/arcsec^2, down to a magnitude limit of
b_j < 17. With the Parkes 64m Radiotelescope 35 objects were detected at v <
4300 km/s. The resulting luminosity function, HI mass function, and for the
first time field mass function are presented. It is found that LSBs make a
negligible contribution to the overall integrated luminosity, HI mass, and
total mass contained in galaxies.
