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EDWARD HORNE CRAIGIE 



by various methods on account of the fact that it is very in- 

 completely myelinated in this animal, and that those myelin 

 sheaths which are present are very thin (Ranson, '13, '14). This 

 tract was found to stand out quite clearly, even with the simple 

 picric-acid stain, so that it was easy to consider it by itself, which 

 was fortunate, since the difference in vascularity between it 

 and the neighboring fasciculus cuneatus was marked. King 

 ('10), observing that very few fibers were shown in this tract by 



113 + 3 



6 7 8 9 iO II 12 13 14 15 16 17 IB 19 20 21 



Ports of Brain 



Chart 2 Graph showing the relative average vascularity of the regions 

 studied. 



Regions 



1, fasciculus cuneatus 



2, ventral column 



3, lateral column 



4, pyramidal tract 



5, fasciculus longitudinalis dorsalis 



6, substantia gelatinosa Rolandi 



7, nucleus motorius VII 



8, nucleus XII 



9, nucleus motorius V 



10, ventral horn; spinal cord 

 //, spinal V nucleus 



12, nucleus of Deiters 



13, molecular layer of cerebellar cortex 



14, dorsal horn; spinal cord 



15, inferior olive 



16, superior olive 



17, chief sensory V nucleus 



18, granule layer of cerebellar cortex 



19, nucleus dentatus 



20, chief vestibular nucleus 



21, dorsal cochlear nucleus 



