Help! Can you tell me what clef this is?

The only thing I can think of that you might be describing is a 64th rest, which would look something like this: a href="http://en.wikipedia.org/wiki/File:64th_rest.svg" rel="nofollow"http://en.wikipedia.org/wiki/File:64th_r…/a . The lines would go the other way in that case though. It would be helpful if you could provide either a scan of the score in which it appears, or at least the composer, full title of the work, and measure number in which the marking appears.