Herrick, Gustatory Paths in Fishes. 



407 



Fig. ig. Longitudinal section through the left vagal lobe of a young carp, 

 5 cm, long. GoLGi method. X 40. 



The section is approximately horizontal, but strongly inclined so that the left 

 side is farther dorsal. It shows the descending secondary gustatory tract [desc. 

 s.g.t.) from the vagal lobe to the region of the nucleus funiculi. At the periph- 

 ery of the vagal lobe in the regions marked by the crosses there is a very rich 

 impregnation of cells among which the secondary fibers arise, which are omitted 

 so as not to confuse the drawing, since they are too densely impregnated to per- 

 mit an accurate determination of their relations to the fibers. These cells 'are 

 partly chief secondary neurones like those of Fig. 7, and partly the smaller type 

 as shown in Fig. ii. A very few fibers of the ascending secondary gustatory 

 tract (asc.s.g.i.) from the vagal lobe are shown. This tract appears voluminously 

 a few sections ventrad in the position indicated by the arrow. The median line 

 is indicated by the position of the left and right fasciculi longitudinales mediales 

 {/.L and/.r.). The lemniscus on both the left (//«./.) and right (/m.r.) sides is 

 shown ; also the position of the funicular nucleus and commissural nucleus of 

 Cajal (n.com.). 



