Herrick, Gustatory Paths in Fishes. 



435 



part of Fig. 35 and another as seen from above in horizontal 

 section in Fig. 36. Ventro-mesially of the facial lobe, espe- 

 cially its caudal part, is a region of sparse cells which extends 

 caudad to join the intermediate nucleus of the vagal lobe. It 

 will be termed the intermediate nucleus of the facial lobe and is 

 strictly comparable with the corresponding region of cyprinoids. 



^^E'- 3^- -'^ secondary neurone of the dorsal part of the facial lobe of Araei- 

 urus as seen from above. Golgi method. X 500. 



Drawn from a horizontal longitudinal section passing through the extreme 

 dorsal part of the facial lobe. The neurite extends ventrally at right angles to 

 the plane of the section (cf. Fig. 35) and hence of course does not appear in this 

 preparation. 



The greater part of the chief gustatory neurones of the 

 vagal and facial lobes, as we have seen, send their neurites into 

 the ascending secondary gustatory tract, or central gustatory 

 path (secondary vagus bundle of Mayser). This ascending 

 tract terminates in the secondary gustatory nuclei under the 

 cerebellum, partly on the same side and in smaller numbers on 

 the opposite side. These nuclei lie in the isthmus close under 

 the cerebellum at the point where the body of this organ is 

 joined by the valvula cerebelli. The two nuclei are connected 



