228 Jourtial of Coviparativc Neurology and Psychology. 



as \oofc and expressing the other areas as percentages of 

 this standard. Each percent in the \-alues thus obtained, is rep- 

 resented by I mm. on the axis of the ordinate-^. 



In the curves in Fig 5 one sees the relative number of 

 fibers in each of the dorsal and ventral roots, and it is at once 

 evident that this number undergoes a much greater variation in 

 the dorsal than in the ventral roots. 



TABLE VI. 



Showing the Number of Nerve Fiber.s in the Ventral and Dorsal 

 Hoots, and Relation Between Them. 



653,627 



