Upper end of tibia, with semilunar cartilages and attached portions of crucial ligamanents.
"Diagrams of the girdles and appendages in a typical Vertebrate. A, anterior; B, posterior. ac., acetabulum,…
"f., Femur; ti., tibia; fi., fibula; i., intermedium; t., tibiale (astragalus); f., fibulare (os calcis);…