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CCD B and V observations of 16 low-surface-brightness galaxies and HI data for a subsample of 4 of them are presented. Both paired and isolated dwarf galaxies are observed to study possible environmental eects on their characteristics. Most of the observed galaxies are true dwarfs with 8.0 MB 16.0, blue colours (0.16 B V 0.76) and low central surface brightnesses 22.2 B 24.0 mag arcsec 2 . Most of them show exponential light proles with a central light depression. About half of them have bright generally blue knots or peculiar loops.

CCD and HI observations of LSB dwarf galaxies in the general field