Fig. 78. 



Fig. 79. 



Fig. 78. Fresh specimen. From the Ox, exhibiting a medullated 

 nerve which penetrates the membrana propria. The axis cylinder 

 divides into branches upon the membrana propria to form the 

 sub-epithelial plexus. Magnified 590 diameters. 



Fig. 79. From the Ox, showing the termination of one of the 

 thickest nerve fibres at a thick salivary tube blackened by perosmic 

 acid. Magnified 590 diameters. 



Fisr. 81. 



Fig. 80. 



Fig. 80. Showing an axis cylinder breaking up into fibrils 

 which are continuous with the fibrils of the columnar epithelium. 

 Magnified 590 diameters. 



Fig. 81. From the Ox, showing medullated and in part 

 varicose nerves blackened by perosmic acid, which branch in the 

 sub-epithelial plexus, and one of which (n), can be distinctly 

 traced into the processes of the columnar epithelial cells. The 

 preparation exhibits a marginal portion of the surface of a 

 salivary tube. Magnified 800 diameters. 



