The two-dimensional (2-D) magnetopause transition during reconnection is investigated with large-scale hybrid simulations. Contrary to previous studies, but in agreement with observations, the two discontinuities that form are not an intermediate shock or a slow shock. A 2-D reconnection configuration develops with jumps that do not satisfy Rankine-Hugoniot conditions of known discontinuities. All plasma quantities are fairly constant between the discontinuities. This region is characterized by a nearly unchanged sheath density, slight temperature enhancement, and significant magnetic field depression and thus resembles the Sheath Transition Layer of Song et al. [1989>. For a non-coplanar magnetic field Bzo, the plasma &bgr; attains very high values on the outflow side where Bzo and the Hall-generated field cancel, and the jet becomes unstable. In this case, the magnetosheath-side discontinuity resembles the often-observed rotational discontinuity. ¿ 1999 American Geophysical Union