(Chapter 26) Footnote 22:

This section was rewritten and expanded as follows in the 1555 edition: “Because the bone that supports the index finger is articulated more proximally to the carpus, or comes closer to the forearm in its attachment there than the bone placed before the middle finger, the middle finger rightly appears longer in a hand that is still intact, and it runs correspondingly farther down to the fingers. All the metacarpal bones, perfectly matching the number of fingers which they support, and having, like the humerus, a long cavity inside where the marrow is contained, have epiphyses at either end, of which the proximal sometimes in children weakly shows their bond to the rest of the bone. These epiphyses are, as we stated earlier, joined to the carpal bones; the metacarpals themselves are somewhat wider on the outside than on the inside, so that the metacarpus together with the carpus will better make a convex surface on the outside but concave on the inside.”