(Chapter 38) Footnote 28:

Vesalius rewrote this section in the 1555 edition to read: “The remaining cartilages, which more or less resemble our letter C, and which later occur in succession under the larynx through the entire stem of the rough artery and all the scattered branches in the body of the lung itself, together with others belonging to the investigation of the rough artery, will be treated in the sixth book.”