Thank you for that link. I went to Preferences and added the fonts but they still didn't show up.
Now I am wondering if Scribus doesn't like TrueType fonts, or prefers Postscript fonts, which require the suitcase and the PS file. TrueType is more modern and the icon for the fonts prefs says "TT," which leads me to believe TrueType is fine.
I'm stumped. Anyone?