Binned spectra with light from the brighter star removed. Orbital phases are listed below each spectrum. The central absorption in the Si II emission lines at some phases is due to an imperfect match with the Rigel spectrum. The overall strengths of the Si II emission lines vary with orbital phase. Absorption blueward of Si II emission at 6347 Å is seen at some phases, suggesting a P Cygni profile. Wavelengths near He I are shown in the right-hand panel. The broad He I feature changes character with orbital phase, and the movement with wavelength is consistent with motions in the direction expected for the companion star. Broad emission redward of the He I absorption component is also seen at most phases, except near periastron. The behavior of the emission lines suggests that the envelope around the companion is not symmetric.