(Chapter 15) Footnote 122:

Vesalius cites book 13 of De usu partium, where see 4.66.19-4.67.3: “[There are] eleven from the cervical vertebrae, from five of them, that is, but seven from the first two, ...” (tr. May 1967, p. 582). May here translates Helmreich’s reading of the Greek text, where Galen qualifies his statement regarding the number of processes (toi=j de\ ka/tw instead of tou\j gou=n): see May, ibid. n. 62.