64 



MAX MAYO MILLER 



EXPLANATION OF FIGURES 



Figures 1 to 5 represent outline drawings of actual cross-sections of different 

 regions in the various spinal cords studied. X 12. Where the sections drawn did 

 not show any nerve roots, the lines of separation for the various columns of white 

 matter were approximated. C, central canal; E, ependyma; P, posterior horns of 

 gray matter; A, anterior horns of gray matter; I, lateral columns of white matter; 

 p, posterior columns of white matter; a, anterior columns of white matter. 

 Fig. 1 a 5th cervical segment, 11 mm. embryo. 



11 mm. embryo. 

 17 mm. embryo. 

 17 mm. embryo. 

 31 mm. embryo. 

 31 mm. embryo. 

 31 mrn. embryo. 

 65 mm. embryo. 

 65 mm. embryo. 

 65 mm. embryo. 

 1.50 mm. embryo. 

 150 mm. embryo. 



