212 Journal of CoDiparative Neurology and Psychology. 



plained in part by the fact that he divided the roots into a 

 smaller number of fascicles (211 against 365) and that he did 

 not correct for the fascicles cut obliquely. At the same time 

 it seems necessary to assume that the ventral nerves in Still- 



TABLE I. 



Areas in ,<([. mm. of Cross-Sections i)f the Ventral Roots of the Left 

 .Si)inal Nerves of iNIan. 



Average length 

 of Segments in 



2.5 .04 



Totals 31 4+1-9 '>ii"- 34-5I mni^. 26.50 mm-' 35-23 mm'' 



' Interpolated. 



