  We consider the conductance of a normal-superconductor junction in bilayer
graphene in the framework of the Dirac-Bogoliubov-De-Gennes equation. A
remarkable suppression of the conductance at voltages just below the
superconducting gap is found. This can be understood in terms of the spinor
structures of the electron and hole excitations, in particular the reflected
valence band hole being orthogonal to the incoming electron at normal
incidence.
  Minor changes in response to referee reports, references updated.
