252 JouRNAL OF COMPARATIVE NEUROLOGY. 
splitting fibers, the number going to any segment of the leg, 
calculated on the basis of the proportional area of skin and the 
proportional weight of the muscles, agrees very closely with 
the number observed. . 
To generalize these results, it is desirable to know, not 
only what percentage of all the fibers which enter the leg goes to 
any segment, as given by the formulain Table X, but also the 
percentage of that number that should be added to the supply 
of a given segment, to make it equal to the observed number. 
This can be obtained by tabulating in each case the esti- 
mated and observed numbers, finding the number of fibers by 
which they differ and the percentage value of this number on 
the basis of the number estimated. 
The averages of the percentages in each case then show 
the proportion of fibers which should be added to the estimate 
in order to represent the number which would probably be 
observed. 
TABLE XXV. 
Showing the percentage of the estimated number of fibers to be added 
in order to make the estimate agree with the number observed. 
Thigh 
Estimate Added Required 
Frog j 46% in calculation to balance 
Ber: 2426 151 = 6.2% 197 
13}, Ue 2477 131 = 5.3% 138 
Cox: 2765 i 4-3% 49 
Ci 2754 133 = 4.8% 23 
Beir. 3269 237 = 7.2% 239 
BIL 3279 228 = 7.0% 212 
Total 16970 999 59% 858 = 5.0% 
Difference = .9% 
Shank 
25-3% 
Ballo 1796 320 = 17.8% 334 
Balle 1802 308 = 17.1% 306 
Total 3598 628 = 17.5% 640 = 18% 
Difference = 0.5% 
Foot 
28.7% 
BIl. r 2042 455 = 22.3% 455 
Baal 2048 436 = 21.3% 436 
Total 4090 891 = 21.8% 891 = 21.8% 
Difference = 0% 
