94 P.ULLETIN OF THE LABORATORIES 



Fig. 3. Cells from the pons nucleus near its caudad portion on the left side. 

 The arrow points backward. 



Fig. 4, A portion of the two nuclei of the fifth, corresponding to the point 

 at Be. Fig. 2, but on the opposite side. « illustrates the motor, b the bladder cells. 

 The arrow points backward. Both are drawn to the same scale with camera luci- 

 da from the section shown in part in Fig. 2. 



Fig. 5. Cells from nucleus of facialis to show the processes 



Fig. 6. Semi-diagramatic section perpendicularly through the four outer lay- 

 ers of the nates, including the outer part of the tectum. 



