Rear Seat Back Removal

Alright, I've got the front bench out, and the rear bottom cushion out. Now I'm having problems getting the back of the rear seat out.

I've found both clips that hold the seat up, unbent them, and pulled. The bottom part of the seat is free, but it seems that the top is still held on by something. I've crawled into the trunk and looked, but haven't found anything.

What is it that I'm missing?