  It has been claimed that the megamaser observations of the nucleus of NGC
4258 show that a massive black hole is present in its center (Miyoshi et al.
1995, Greenhill et al. 1995). We show that the evidence of ejection of gas,
radio plasma, and X-ray emitting QSOs from this nucleus all show that the
ejection is coming from the center in a curving flow within a cone with angle
~40 degrees, centered at P.A. 100 degrees. This is close to the direction in
which the velocities from the megamaser have been measured, so that the
evidence taken as a whole suggests that the masering gas also is being ejected
in the same direction at velocities +/- 900 km/sec and not rotating about a
massive black hole. Thus it does not provide evidence for a black hole in the
center.
  Subject headings: galaxies: nuclei: individual (NGC 4258) -- black holes --
masers
