I don't think the judge allowed any expert testimony (other than Bryan's). Some of the witnesses that Darrow was going to use may have intended to mention Piltdown man and Nebraska man (two hoaxes that were even then in doubt), but they didn't testify. Do you know of any evidence that was actually presented which was later found to be false?
ICR (very anti-evo) says yes.
www.antievolution.org says maybe.
antievolution.org seems rather fair with a slight tilt to the pro-evo side-- check it's home page.
Antievolution.org also says Judge Raulston did not permit any testimony in the official presence of the jury, but one witness testified and several affidavits were read into the record when the jury was excused.
In an interesting but unrelated matter, the antievolution.org site indicates the inspiration for Johnny Cash's "Boy Named Sue" cannot be discounted from being a member of the Scopes' prosecution team.