The muscles on the back of the thigh.
The Encyclopedia Britannica (New York, NY: The Encyclopedia Britannica Company, 1910)
TIFF (full resolution)
1057×2400, 866.8 KiB
Large GIF
450×1024, 121.8 KiB
Medium GIF
281×640, 55.4 KiB
Small GIF
140×320, 15.9 KiB