This image shows the region of the cat skeleton containing the pelvic girdle and its attached appendages*, the femurs (1).  The pelvic girdle consists of three pairs of bones, the ilium (2), the ischium (3) and the pubis (4) that are fused together in a rigid structure.  Also seen on the image are four of the last seven lumbar vertebrae (5), the three sacral vertebrae (6) that are fused to form a sacrum to which the pelvic girdle is attached and two of the caudal vertebrae (7).

*Note: To see the other major bones of the cat's hind limbs, click here.