The structure of rotational discontinuities (RDs) has been studied through hybrid simulations for a range of propagation angle &THgr;bn between the discontinuity normal and the upstream magnetic field and plasma &bgr;. For sufficiently narrow initial states, the simulations produce quasisteady ''reverse rotation'' magnetic field structures for 30¿≤&THgr;bn≤60¿ and 0<&bgr;≤1 on a time scale of roughly 200 &OHgr;i-1. This structure is characterized by a right handed field rotation upstream joined smoothly to a left handed field rotation downstream; its width decreases from 60--70 c/&ohgr;pi at &THgr;bn=30¿ to less than 25 c/&ohgr;pi at &THgr;bn=60¿. The magnetic field hodograms of our RD results have a distinctive S-shape which is most pronounced in sumulations with small &THgr;bn and initially right handed rotations. The reverse rotation structure is the net result of the expansion of the initial current layer via the fast and intermediate wave modes. ¿American Geophysical Union 1991