714 journal of Cojnparative Neurology and Psychology. 



to the muscles. Dunn, 1900, after a comparison of intact muscular 

 and cutaneous branches, arrived at the conclusion that the muscular 

 branches containing medullated afferent and efferent nerve fibers 



TABLE XVI. 

 Showing the relation in square micra of the average areas of the ten largest mus- 

 cular afferent and the ten largest cutaneous afferent nerve fibers in the thigh and in 

 the shank of the left leg of frog E. 



TABLE XVII. 

 Showing the average areas in square micra of the largest medullated nerve fibers 

 at various levels in the operated and unoperated legs of frog E as compared with one 

 another and with the corresponding averages in the intact leg of frog IIB. 



could be distinguished from the cutaneous branches containing affer- 

 ent medullated fibers by the greater number of nerve fibers of a 

 uniform size in the muscular branches. In the present study, after 



