334 Journal of Comparative Neurology. 



which is indicated by it. Thus the curve for the transverse 

 diameter of the brain indicates that growth is still going on 

 there, when it has nearly stopped in the long axis. For the 

 spinal cord, the reverse relation is shown. 



XIII. Observations on the Legs. 



The results under this head can be stated in a condensed 

 form. 



There are 33 complete records given in Table 7. 



For convenience these are here arranged in three groups : 



Group I. 16 cases including No. 20 A. 



Group II. 13 cases including No. 41 A. 



Group III. 4 cases including No. 52 C. 



XIV. Weight of the Muscles of the Legs. 



As compared with the weight of the entire body the weight 

 of the muscles of the legs is as follows : 



TABLE 9. 



Proportional weight of the 

 muscles of both legs 



Group I. 30-5/0 



Group II. 29.3% 



Group III. 28.6% 



This indicates a slight but steady decrease in this propor- 

 tion. The weights of the muscles of the right and left sides 

 are rarely alike, but there is no evidence of a difference predom- 

 inantly in favor of one side. 



When the weight of the muscles of the thigh is compared 

 with that of the muscles from the remainder of the leg, the re- 

 lation is found to be nearly constant. 



TABLE ID. 



Ratio of To weight of muscles of 



Weight of muscles the remainder 



of thigh. of the leg. 



Group I. 1.867 I 



Group II. 1.869 I 



Group III. I 857 1 



In both instances the individual variations are compara- 

 tively small, so that the averages are applicable to special cases. 



