Note 719 — Chapter XVIII
Reading edition
In very old crocodiles an analogous apophysis, which is generally cartilaginous, is sometimes found, ossified (Owen).
[720] The acetabulum, or socket for the head of the thigh-bone, is always perforated. The femur has a surface for the articulation of the fibula; and by this character the femur of all birds may be distinguished. There is always a patella.
[721] The lower end of the tibia is very like that of the femur.