(Chapter 33) Footnote 48:

The 1555 edition adds the following, which replaces the deletion noted in the preceding note: “The talus is flexed and extended on this entire joint of the talus with the tibia and the fibula and by their entry, as it were, into each other, virtually without any motion to the sides — a motion which dogs lack to an even greater degree, the deeper the socket with which the projection of their talus is carved along its length than in man, and the more it is restricted by its fit with the tibia.”