PHYSIOLOGICAL STUDIES OF GUSTATORY MECHANISMS 241 



non-fasciculated with a number of perineural trabeculae (Fig. 6) but in 

 adjacent sections were found to have two or three fascicuH. In the chorda 

 tympani nerves of the dog and cat, large fibers remained in the same quad- 



SHEEP 





4 0^ 



Fig. 6. Composite photomicrographs of cross sections (6//) of chorda tympani 

 nerves from the cow, pig, sheep, and goat. Wolters modification of the 

 Weigert-Pal technique. Original photomicrographs enlarged 750 X. Areas 

 of overlap were then removed, the proper pieces assembled and rephotographed. 

 See Fig. 9 for histograms illustrating the fiber diameter frequency distribution 

 of these nerves. See also Table 1 (Engebretsen and Kitchell, unpublished). 



rant of the nerve in a number of interrupted serial sections. Fibers were 

 seldom sectioned on a tangent in cross-sections of chorda tympani nerves 

 in these animals. These findings indicate that the fibers in the chorda 

 tympani nerves of dogs and cats are parallel to each other for considerable 



