394 Journal of Comparative Neurology and Psychology. 



in the ascending secondary tract I have not determined. 



These neurones clearly are of the same type as the chief 

 gustatory neurones, but their neurites have a shorter course as 

 a rule. Cells of this type in my preparations are impreg- 

 nated chiefty in the more superficial parts of the layer of sec- 



facial lobe 



motor /ai/er 



subs! retiCulans'^A'-^ 



T 



Fig. II. Transverse section through the vagal and facial lobes of a young 

 carp 5 cm. long. The section is obliquely inclined with the left side a little far- 

 ther caudad than the right and the dorsal side much farther cephalad than the 

 ventral. GoLGi method. X 40- 



The section passes through the extreme cephalic end of the vagal lobe. None 

 of the chief gustatory neurones are impregnated in this preparation, the super- 

 ficial cells drawn being of the smaller variety. Among them are two intrinsic 

 neurones of the vagal lobe. There is impregnated also a single large neurone in 

 the dorsal part of the substantia reticularis one of whose dendrites reaches the 

 layer of secondary gustatory tracts and whose neurite passes toward the ventral 

 commissure. 



f.l.tn., fasciculus longitudinalis medialis ; /;//., lemniscus ; mot.r., motor root 

 of the vagus ; s.g.t., secondary gustatory tract ; s. V, spinal V tract. 



ondary neurones ; but sections stained with haematoxylin show 

 very numerous nuclei of the same appearance throughout this 

 layer and occasional Golgi impregnations show that they are in 

 fact scattered less freely throughout the thickness of the layer. 

 There are frequent impregnations, usually very imperfect, 

 of larger cells of different kinds in the deeper parts of this layer. 



