(Chapter 21) Footnote 40:

As seen in figure 2 of this chapter. “Sigmoid,” also used by Galen for the cartilages of the trachea ( De anat. adm. 602.16, Singer 1956 p. 178) and the pulmonary and aortic semilunar valves ( De anat. adm. 602.16, 617.9, Singer 1956 p. 185, De usu partium 3.477.7 and 18, 478.5, May 1968 pp. 314f.), denotes the coracoid process in De usu partium 4.133.2 (May 1968 p. 615). Vesalius’ nomenclature is significantly post-Galenic, for in this last passage Galen identifies the acromion with the name coracoid. See May 1968 p. 615 n. 55, and note 14 below.