Considerable individual variation was found in both the muscles and the nerves of the leg of the species studied. Certain muscles were more variable than others. Mm. flexor digitorum longus, obturator, caudofemoralis, and extensor hallucis longus showed the greatest number of variations. Mm. vastus medialis, femoritibialis internus, flexor perforatus digiti III, extensor brevis digiti III, and abductor digiti IV did not exhibit any variations considered significant. Certain legs showed a greater number of variations from the typical condition than did others. Although most of the variations were minor, some were major. M. extensor proprius digiti III was present in two legs of _Pedioecetes_ but absent in the other legs studied. A fleshy muscle slip connected M. caudofemoralis pars caudifemoralis with the tendinous raphe between Mm. flexor cruris lateralis and femorocruralis in two legs, whereas in others this connection was tendinous or even absent altogether. M. flexor cruris lateralis had an accessory slip arising from the caudal musculature in one leg. A vinculum connected the insertional tendons of Mm. flexor perforans et perforatus digiti II and flexor perforatus digiti II in one leg. In most specimens there was as much variation between the muscles of the right and left legs of one individual as there was between individuals. The same was true for the nerves, except for the lumbosacral plexus, in which there was no significant variation between the right and left sides of any individual. The peroneal and obturator nerves varied less than the other nerves. No constant differences in the muscles or nerves was found between _T. cupido pinnatus_ and _T. c. attwateri_. One constant difference was found between _T. cupido_ and _T. pallidicinctus_: the fleshy origin of M. extensor iliotibialis lateralis in _T. cupido_ was thicker (associated with a thicker edge of the lateral iliac process). Although no constant differences in the nerves were found between _Pedioecetes_ and _Tympanuchus_ (both species), 17 constant differences in the muscles were found between these two genera. Study of additional specimens possibly would show enough individual variation in some of these differences to reduce the number of constant differences to fewer than 17. Seven of these differences pertain to features of a single muscle--M. flexor cruris medialis. Some of the other differences are associated with the thinner and much less pronounced lateral iliac process in _Pedioecetes_. The picture of the differences between _Tympanuchus_ and _Pedioecetes_ that this study presents is radically different from that presented by the study of Hudson, _et al._ (1959). The important differences in innervation between previous studies and the present one are discussed.