Correlation between oxygen abundance and the gas mass. The dIs are plotted with circles and BCDs with triangles. ﹩T_{e}﹩‐based abundances are plotted as filled symbols and ﹩R_{23}﹩‐based abundances as open symbols. The dIs with a greater gas mass are more abundant in metals. Ignoring NGC 5264, the geometric linear fit to the dI data is marked by a solid line. For comparison, the fit found by Lee et al. (2003b) is shown with a dotted line. BCDs often have less gas than dIs at a given metallicity.