Injury-hit Montferrand go through
Bath went into the match without key backs Mike Tindall and Iain Balshaw and prop David Flatman, and their chances were not helped when tighthead prop Duncan Bell limped off after five minutes.
Montferrand took immediate advantage to take a 28-3 lead into the halftime break and never looked back as the Bath pack disintegrated and their backline began to panic.