Plymouth Albion will start the second half of the campaign at least eight points adrift of the Championship play-offs after losing at Nottingham.
Albion were grateful to be just 10-3 down at the break after an early Ayoola Erinle try for the home side.
James Arlidge's drop goal and an Alex Shaw try stretched Nottingham's lead before captain Aaron Carpenter crossed for Albion with seven minutes left.
But late tries from Joe Cobden and Juan Socino extinguished Plymouth hopes.
James Love kicked two goals at Meadow Lane, a first-half penalty and a successful conversion of Carpenter's try.
Nottingham's bonus point win - their fifth league victory of the season - lifted the Green and Whites to within six points of top spot.