412 



C. JUDSON HERRICK 



In r b. 



Fig. 31 Transverse section at the rostral border of the lateralis VII roots, the 

 section being oblique with the left side farther rostrad. Golgi method. X 100. 

 Two neurones are impregnated, the axon in each case being directed toward the 

 ventral commissure. The more lateral neurone is typical for the substantia gela- 

 tinosa Rolandi, the chief dendrites arborizing in the spinal V root. Other den- 

 drites, however, reach the VIII root, the secondary visceral tract and the tegmen- 

 tum. The more ventral neurone is typical for the motor tegmentum, the chief 

 dendrites arborizing in the tractus tecto-bulbaris. 



Fig. 32 Transverse section at the level of the VII and VIII roots. Two neu- 

 rones of the area acustico-lateralis are seen sending their dendrites into particular 

 fascicles of the stratum album. Neurone A, related chiefly with the VIII root, is 

 sketched in from the adjacent section rostrad. Golgi method. X 100. 



Fig. 33 Transverse section at the rostral border of the lateralis VII roots, illus- 

 trating a single neurone of the tegmentum (formatio reticularis type). Its den- 

 drites reach the lateral part of the tegmentum and still larger ones (cut off in the 

 preparation) spread out in the marginal zone of the gray substance among the 

 arcuate fibers. The axon is directed into the ventral commissure and gives off 

 numerous collaterals close to the cell body. Golgi method. X 100. 



