708 Journal of Comparative Neurology and Psychology. 



results similarly carried out an excess of fibers has been found rather 

 than this loss. Sixty-four medullated nerve fibers then have dropped 

 out either from the primary branches or from the lovv^er level of the 

 main trunk or perhaps divided between the two. This is the number 



TABLE XIV. 

 Giving the estimation of the number of efferent medullated nerve fibers in the 

 primary muscular branches to the thigh of frog E. 



TABLE XV. 

 Giving the estimation of the number of efferent medullated nerve fibers in the 

 primary muscular branches to the shank of frog E. 



lost if no splitting occurs among those remaining. The probability 

 however is that splitting occurs among both afferent and efferent 

 fibers in aljout the same percentages. The argument for this splitting 

 among the efferent fibers was given in the discussion of splitting 

 among the afferent fibers and is based on a comparison of the per- 



