seat removal

this might be something obvious that I am missing but how do you get the back seat out? I have a 64 Dart 2dr. and am removing the old carpet. I got the upper part to lift up and tilt forward but it seems like something is still holding it down. I was also able to feel that the lower part seems like it would tilt up from the back part but since I can't get the upper out of the way I'm stuck?! PLEASE HELP!