(357 



- b 



a medial. 



Fis. 14. 

 b lateral part of X 1. 



Fig. 13. 

 Likewise in this region it 

 can be seen that cells some- 

 times occur medially from 

 the whole, in the so-called 

 middle horn, dorso-lateral • 

 from the canalis centralis, as 

 has been found before. Now 

 follow scores of sections in 

 which the XI nucleus is not 

 present at the usual place, 

 or but faintlj' indicated, 

 though lateral frontal-horn 

 cells with a strong upward ten- 

 dency can be seen, or cells 

 in a horizontal direction, 

 lateral in the middle horn. 

 This is followed again by a 

 marked bulging and laterally 

 by a growth of the XI nucleus 

 in the substantia reticularis 

 to a complex of a maximum 

 of 38 cells, after which the 

 reduction begins again under 



