The ion drift meter on the polar orbiting DMSP F-10 spacecraft observed bubble-like features near the magnetic equator that have remarkably continuous transitions in ion concentration (Ni) and drift velocity, where there is a high positive correlation between upward velocity and decreased Ni. This is in marked contrast to the virtually discontinuous transitions that are characteristics of most bubbles. We conclude that these new features were probably observed on the bottomside of the F-layer at DMSP altitudes (750--850 km), much higher than normally accepted values. These observations were made during Feb.-Mar.-Apr. of 1991, when Ni exceeded 106 cm-3 nearly every equator crossing. ¿ American Geophysical Union 1994