98 



the n3r\^3-col L;=5 oft^ii ^ippenr superp^saJ one over -inother, ani 

 th9 processv'?.-? :D=ike a varitnble t'^nAle of ifiterl^icini^, branches 

 (?ig.21.in.n. ). 



The nearoaas of the level are to be distinguished from 

 those of the deeper layer, on the other hand, both by their 

 compactness and by their mode of branching, v?hich is of the 

 radiatini^ type. The several processes of a nerve-cell spread 

 oat anl branch freely in all directions, bat they do not ex- 

 teni far away from their points of ori>|ifi. A representative 

 forn is dra^vn in Pig. 22. There are always several dendrites, 

 and these may arise either from the outer end or from the side 

 of the polygonal oell-body. The branching begins quite near 

 the origin, so that the size diminishes rapidly from the base 

 outward. The dendrites of the outer extremity have their finest 

 twigs penetrating the superficial layer of nerve-fibres. The 

 dendrites arising from the sides of a cell interlace more large- 

 ly with those of other neurones. The surface of a dendrite 

 always bears an abundance of simple gemraules. 



The axone pursues an irregular coarse, often spreading 

 over a considerable horizontal area, but the general treni is 

 ever toward the center of the brain. It gives off a great 

 profusion of collaterals as it proceeds, an3 the final terni- 

 nation is found at no great Ustance from the cell-body. There 

 is here, then, an illustration of a cell of the Golgi II type. 

 The several ramifying axones lie in the region occupied by the 

 cells of the deeper layer. 



