All six variations in the lumbosacral plexus were found on both sides of each specimen exhibiting the variation. In marked contrast to the other nerves, there was no significant variation in the lumbosacral plexus between the right and left sides of one individual. (This might not always be true, however, if a larger number of specimens were studied.) Of the variations in the lumbosacral plexus, one was found in only one specimen (of 15), one was found in three specimens, one in four specimens, two in six specimens, and one in seven specimens. Of the 34 variations found in the other nerves, 14 were found in only one leg (of 23), six occurred in two legs, four in three legs, three in four legs, three in five legs, two in six legs, one in seven legs, and one in nine legs. Four of the variations were found only in specimens in which only one leg was dissected. Considering only those eight specimens in which both legs were dissected, and excluding the lumbosacral plexus, ten of the 30 variations were found in both legs of each specimen exhibiting the variation; 16 variations were found in only one leg of each specimen exhibiting the variation; four variations were found in both legs of some specimens but in only one leg of other specimens. The number of variations in common between the two legs of one individual was compared with the number between individuals in the same manner as for the muscles; the lumbosacral plexus was excluded from consideration. See table 6. One leg of six of the eight specimens showed at least as many variations in common with a leg of another individual as with the other leg of the same individual. The two exceptions were T.p. 2L and T.p. 3R. Thus for most specimens there was as much variation in the nerves other than the lumbosacral plexus between the right and left legs of one individual as there was between individuals. Of the 40 nerve variations (including the lumbosacral plexus) 11 were found only in _T. pallidicinctus_, seven were found only in _T. cupido_, and seven were found only in _Pedioecetes_. Four were found in both species of _Tympanuchus_ (but not in _Pedioecetes_). Eleven were found in both _Tympanuchus_ and _Pedioecetes_; of these, four were found in all three species, three were shared by _T. pallidicinctus_ and _Pedioecetes_ and four occurred in _T. cupido_ and _Pedioecetes_. The average number of variations per leg in both muscles and nerves was 11 in _T. pallidicinctus_, nine in _T. cupido_, and 16 in _Pedioecetes_. The high number in the last is in part the result of these being variations from the typical condition of _T. pallidicinctus_ (rather than from _Pedioecetes_). _Analysis of Variation Between Species_