The results of UBVR and H alpha imaging and moderate resolution optical spectroscopy of 28 gas-rich, quiescent dwarf galaxies are presented. The majority of these galaxies are distinguished by unusually high values of hydrogen-mass-to-optical-luminosity, extensive low surface brightness structure, and inefficient star formation processes. All are gas-rich, with typical gas depletion times on the order of 10^11 years. As seen in other studies of dwarf galaxies, the derived oxygen abundances range from 1/3rd to 1/24th of solar, with typical values between 1/4th to 1/8th of solar. The observed colors and metallicities will be used in the future to constrain the evolutionary status of these star formation inhibited galaxies.
ADS abstract