186 



are more crowded. In most cases the cells in this region present such 

 a tangle of intertwining dendrites that it is impossible to make a satis- 

 factory drawing of them. 



In Fig. 5 are shown four fibers of the visceral sensory component 

 of the N. vagus which appear in the left half of the same section from 

 which Fig, 4 was taken. At a in Fig. 5 the position of the cells and 

 fibers in these two figures is shown in a small sketch. The visceral 

 sensory fibers give oif end branches in the region occupied by the 

 cells shown in Figs, 1, 2, 3 and 4. 



Fig. 3. Part of the transverse section next caudal to the one shown in Fig. 2. 

 A cell of the nucleus commissuralis whose axone shows a branching collateral. Magn. 

 about 190 diam. 



In Fig. 6 is shown a single cell from the column lateral to the 

 nucleus commissuralis, 360 microns anterior to the level of Fig. 2. This 

 neurone belongs to the "nucleus funiculi" or somatic sensory column. 

 It is distinguished by its long, straight, slightly branched dendrites 

 and by the fact that its axone goes ventro-medially in the central 

 gray. Axones of cells of this column are often "traced across the me- 

 dian raphe as internal arcuate fibers. In Fig. 7 are shown two neu- 

 rones from the same column on the right side in the next section 

 farther forward. In this section are seen three fibers which come in 

 from the cutaneous component of the N. vagus. One of the fibers bi- 

 furcates in this section and all three fibers show fine collateral or end 



