Luminosity classifications of dwarf galaxies.

Luminosity classifications are given for 243 dwarf galaxies with diameters φ > 1.0' and located north of δ = -33°. The distribution of these dwarfs over the sky is seen to be similar to that of the nearer giant galaxies. The space density of dwarf galaxies is approximately 0.1 galaxy/Mpc³. Attention is drawn to the striking difference between the luminosity functions of spiral and irregular galaxies. Giant spirals outnumber giant irregulars but dwarf irregulars are more numerous than are dwarf spirals. Barred spirals are found to be more frequent among dwarfs than they are among giant and supergiant spirals.