Fig. 2. The principal muscles of (A) the hindleg (superficial) and (B) the lumbar region of the red kangaroo. Numbers indicate muscles: 1, biceps femoris (cranial); 2, biceps femoris (caudal); 3, caudofemoralis (caudal); 4, caudofemoralis (cranial); 5, coccygeus; 6, crural muscles including gastrocnemius; 7, erector spinae; 8, gluteus medius; 9, gluteus profundus; 10, gluteus superficialis; 11, gracilis; 12, multifdi lumborum; 13, sacrocaudalis dorsalis; 14, sacrocaudalis dorsalis lateralis; 15, sacrocaudalis ventralis; 16, sartorius; 17, semitendinosus; 18, vastus lateralis.