138 KIYOYASU MARUI 



I will first describe my findings in the Levaditi preparations. 

 On the dendrites and on the part of cell-body which is not cov- 

 ered by the 'axone cap' the Golgi net is a single layer; that is to 

 say, one layer of a net surrounds the cell and the dendrites. 

 Each nodal point of this net-work is connected with the cell sur- 

 face by means of a beam, which is attached to the cell surface 

 perpendicularly, with a slightly extended basis (fig. 4): The 

 'axone cap' appears in a triangular shape in Ameiurus sections 

 and is filled with more or less numerous layers of the Golgi net; 

 the nodal points of the net layer, which lies closest to the cell 

 surface, are connected with the latter by a Golgi net beam each. 

 The meshes of the net-work are irregular and of variable size; 

 but, generally speaking, the mesh is smaller the nearer we come 

 to the cell. In Carassius the 'axone cap' has a round shape and 

 here it shows a dense conglomeration of the Golgi net substance. 

 I believe I can compare this heap of the Golgi net substance in 

 the 'axone cap' with that conglomeration of the Golgi net structure 

 which Bethe (7) found on the Purkinje cell of the cerebellum 

 and in other parts of the central nervous system. Most meshes 

 are five or six cornered, but there are many four-cornered and 

 some seven- and eight-cornered ones. At the nodal point of the 

 mesh- work three beams join together as a rule; the nodal points, 

 at which four mesh beams unite together, are rarer. The nodal 

 points of the mesh-work in both the 'axone cap' and on the cell 

 surface are a little thickened, and in my preparations of Caras- 

 sius brain some of them contrast clearly as deeply brown stained 

 round points with the yellow or light brown impregnated Golgi 

 net beams. These points might well be interpreted as the cross- 

 sections of the nerve fibers in. the synapse, as is to be described 

 more precisely below. Unlike Bethe (7), who denied the direct 

 connection between the Golgi net and the 'Flillnetz,' I could find 

 the direct continuity of both the net-works, as has already been 

 claimed by Held (18, 21), Economo (15), and others. The 'Fiill- 

 netz' pervades the whole gray and white matter and fills the space 

 between the myelin sheaths, surrounding the latter with its net- 

 work. At the nodal points and also in the beams of this mesh- 



