INNERVATION OP THE DIGESTIVE TUBE 



185 



neurones which are well stained may readily be overlooked 

 because there is little difference in the intensity of the stain of 

 the fiber and the cell on which it terminates. In the myenteric 

 plexus in the small intestine of the kitten prepared by the meth- 

 ylene blue method, terminal nets could be observed on many of 

 the smaller neurones which were stained so lightly that none of 

 their protoplasmic processes could be traced and the cell-bodies 

 appeared only in faint outline. A terminal net of this type is 

 illustrated in figure 4, A. As the fiber approaches the cell-body 

 on which the terminal net is formed it breaks up into two or more 

 branches which twine about the cell, giving off numerous smaller 

 branches along their course. These slender fibers interlace with 



Fig. 4 Terminations of sympathetic nerve fibers on sympathetic neurones. 

 Spencer, obj. 1.8, oc. 8. 



each other until a network is formed which more or less completely 

 encloses the cell-body. Terminations of this type have been 

 repeatedly described in various parts of the sympathetic nervous 

 system. 



Another type of sympathetic fiber-termination on a sympa- 

 thetic neurone which occurs also in the myenteric plexus is illus- 

 trated in figure 4, B. In this instance the fiber terminates, not on 

 the cell-body, but on the proximal part of a large protoplasmic 

 process in a flattened terminal enlargement from which several 

 small protoplasmic processes reach out like slender pseudopodia. 

 Fibers terminating on the proximal portions of large dendrites were 

 observed also in the submucous plexus in pyridine-silver prepara- 



