Jenny Agutter of
Logan's Run
Linda Harrison of
Planet of the Apes
Caroline Munro of
Starcrash and
At the Earth's Core
This chick was in some SciFi film as well I think...
Apparently, in the future, women will wear less and less clothing. This is a good thing.
ETA: Also, it's nice to know that when humanity has been subjugated by the apes, the hot chicks will still make the effort to shave their legs.