In a spectroscopic survey of the Fornax cluster to B _ { J } = 17.5 using the FLAIR spectrograph on the UK Schmidt Telescope we have discovered seven new compact dwarf cluster members .
These were previously thought to be giant background spirals .
These new members are among the most compact , high surface brightness dwarf galaxies known with absolute magnitudes of M _ { B } \approx - 14 and scale lengths of \alpha \approx 400 pc .
One in particular may be the first high ( normal ) surface brightness dwarf spiral discovered .
Three of the new dwarfs are blue compact dwarfs ( BCDs ) ; their inclusion in the cluster increases the faint end of the BCD luminosity function by a factor of 2 or more .
We extended the survey 2.5 mag fainter with the 2dF spectrograph and in our first field found 7 bright emission line galaxies beyond the Fornax cluster which were unresolved on the sky survey plates .
Galaxies of this type would be missed in most existing galaxy surveys .