Two portions of the COS G130M spectra of DF Tau and V4046 Sgr. For display purposes, the DF Tau spectrum is scaled up by a factor of four and offset by +2 × 10 ⁻¹⁴ erg s ⁻¹ cm ⁻² Å ⁻¹. The red dashed vertical lines identify the fluorescent Lyman-band H ₂ emission lines and the red solid vertical lines identify the fluorescent Werner-band H ₂ lines. The strong emission feature around 1176 Å is the C iii multiplet. Two carbon monoxide (CO) emission features are also marked in the lower panel and will be presented by K. France et al. (2011, in preparation).