Fig. 2. Freedom of intermeta- tarsal movement determined in cast left metatarsus of Tyrannosaurus rex (LACM 7244/23844: cast TMP 82.50.7). a: Depiction of experimental setup. The metatar- sus was wrapped in bungy cords to simulate a mechanism of elastic articulation. Larger cords than those employed in the manipula- tions shown for clarity. b: Arrows show general type of motion. MT II (left) slides in one plane, while MT IV (right) translates along an arc. MT IV was incorrectly re- stored proximally, but this has no effect on the interpretation of dis- tal movement.