(Chapter 27) Footnote 9:

See above Ch. 1 n. 22 and Ch. 3 n. 33. This correction of Galen gave rise to one of Jacobus Sylvius’ rear-guard defenses against post-Galenic anatomy. In De usu partium 3.44.8ff. (May 1968, p. 88) Galen had stated that the finger bones are “hard and solid, without marrow” for the sake of resistance to injury. Cf. In Hippocratis librum de fracturis comm. 18b432.6. Sylvius 1555 p. 86 explained that in Galen’s time the phalanges actually were solid because they were stronger then. See May 1968 p. 88 n. 33.