anklebones

The leg visible to the researchers was bent at the knee, possessing four anklebones but no foot or toe bones.
研究人看到腿在膝盖那里是弯曲的，有四个踝骨，但是没有脚或者脚趾骨。
People in various cultures have used the anklebones of domestic artiodactyls in games and fortune-telling for millennia.
不同文化区域的人们都爱用国内偶蹄动物踝骨做游戏或者占卜。
Living whales were of no help, of course, because they have no anklebones at all.
这点对现代鲸鱼没有任何帮助，自然是因为他们完全没有踝骨了。