The _trochanter_ is a large squarish tuberosity on the lateral surface of the proximal end of the femur. The _trochanteric ridge_ is a sharp, longitudinal (relative to the femur) ridge forming the anterior edge of the trochanter. The _obturator ridge_ is a short, blunt, longitudinal ridge forming the posterior edge of the trochanter. The _anterior intermuscular line_ is a slight ridge extending distally from the trochanteric ridge. The _posterolateral intermuscular line_ is a slight ridge extending distally from the obturator ridge. The _posterior intermuscular line_ is a slight, longitudinal ridge on the mid-posterior surface of the femur. The _internal condyle_ is a large rounded articular prominence on the medial side of the distal end of the femur. On the lateral side of the distal end of the femur are two articular prominences--the lateralmost, smaller one is the _fibular condyle_, separated by the _fibular groove_ (visible from posterior aspect only) from the larger and more medial _external condyle_. The _popliteal area_ is a depression on the posterior surface of the distal part of the femur immediately proximal to the condyles. TIBIOTARSUS AND FIBULA The _inner cnemial crest_ is pronounced and directed anteriorly on the anterior surface of the proximal end of the tibiotarsus. The _outer cnemial crest_ is pronounced and directed anterolaterally on the anterolateral surface of the proximal end of the tibiotarsus. The _rotular crest_ is transverse and forms the anterior border of the proximal end of the tibiotarsus; the crest extends between the dorsal ends of the two cnemial crests and also extends medial to the inner cnemial crest. The _fibular crest_ is longitudinal on the lateral surface of the tibiotarsus and fuses with the middle part of the fibula. The _fibular tubercle_ is small and on the lateral surface of the fibula near the level of the middle of the fibular crest. The _anteromedial intermuscular line_ is a slight ridge extending from the inner cnemial crest down the anteromedial surface of the tibiotarsus. The _anterolateral intermuscular line_ is a slight ridge extending from the fibular crest down the anterolateral surface of the tibiotarsus. The _supratendinal bridge_ is a transverse bony arch over a longitudinal groove near the distal end of the anterior surface of the tibiotarsus. TARSOMETATARSUS