(Chapter 27) Footnote 4:

The rest of this section is rewritten in the 1555 edition: “— like a phalanx or line of battle, placed in an excellent series. That they needed to be built of neither more nor fewer bones than they are may readily be inferred from the fact that if the bones exceeded their given number they would harm the perfect and rugged span which we employ as if the hand were made only of a single bone, and would make it less strong than it now is. Also, if the fingers were made of fewer bones we would be unable to move them into such various fighting configurations.”