Os, (because it lies near Ischium 4588 the loin).

Coxendix cochone; the hip bone. The extent of this bone may be marked by a horizontal line drawn through near the middle of the acetabulum coxendicis; for the body of this bone forms the inferior portion of the acetabulum. The great tuberosity on which we sit, as it advances forwards, becomes smaller, and gives origin to the corpora cavernosa, and the erectores penis or clitoridis; then the bone mounts upwards with a considerable curve, and is stretched out into its small leg. It forms the lower part of the pelvis. The tuberosity is large and irregular, covered apparently with a cartilage, which is in reality the tendinous fibres of the muscles inserted into it. Between the spine and the tuberosity is a cavity on which the obturator muscle plays, as on a pulley, defended by cartilage. The ramus of this bone, which passes forwards and upwards, makes, with the ramus of the os pubis, the foramen magnum ischii.