Distribution of the equivalent widths of Mg I b λ5176 as a function of the spectral types of the ULIGs in the 1 Jy sample (solid lines) and the BGS LIGs of Veilleux et al. (1995; dashed lines). The equivalent widths of the ULIGs are on average smaller than those of the lower luminosity objects. Seyfert ULIGs also have somewhat smaller equivalent widths than LINERs and H II galaxies.