(Chapter 19) Footnote 9:

The non-articular part of the tubercle is for attachment of the lateral costotransverse ligament. The 1555 edition revised this item as follows: “Tubercle in the posterior side of the ribs next to the apex of the transverse vertebra (sic: read process) to which the the rib is articulated, forming the process to which the eleventh of the muscles moving the dorsum is co-inserted.”