ANIMAL AND VEGETABLE 211 



nerve-unit. There is no true anastomosis of the branches 

 from one nerve-cell with those of another, and nerve 

 impulses are transmitted from one nerve-unit to another, 



Fig. 115. 



A LARGE BRANCHING NERVE-CELL, from the brain of an electric fish 

 (Torpedo), magnified 600 times. In the middle of the cell is the large 

 transparent round nucleus, one nucleolus, and, within the latter again, a 

 nucleolinus. The protoplasm of the cell is split into innumerable fine 

 threads (or fibrils), which are embedded in intercellular matter, and are 

 prolonged into the branching processes of the cell (6). One branch (a) 

 passes into a nerve-fibre. (From Max Schultze.) 



through contiguous but not through continuous structures." 

 (Halliburton.) 



