There is strong, albeit indirect, evidence for a sub-Alfv¿nic and transsonic interaction between Triton and the Neputnian magnetosphere. A new inspection of magnetic field data around Triton encounter shows no evidence for the interaction. It is shown that this is due to the geometry of Triton's Alfv¿nic wings, which were probably too far from the spacecraft during the encounter. The situations is complicated by finite ion gyroradius effects, which tend to smear out the simple Alfv¿n wings such as encountered at Io. ¿American Geophysical Union 1991