Herrick, Gustatory Paths in Fishes. 395 



as shovv^n in Figs. 7, 8, 10 and 13 ; but I have not been able 

 to trace the connections of all these types of cells. There are 

 many indications that they reach the motor layer of the vagal 

 lobe (Fig. 14) and substantia reticularis of the oblongata imme- 

 diately below the vagal lobe. In most of these cases the 

 dendrites spread irregularly among the other cells of this layer 



\ 

 \ 



\ 



\ 



\ 

 I 

 I 



Fig. 12. A single neurone of the smaller gustatory type from the right 

 vagal lobe of the carp. Drawn from the same series as Fig. ii, two sections 

 farther caudad. GoLGl method. X 2-0. 



The main axis of the dendrite is directly prolonged to form the neurite. 

 Terminal arborizations of the gustatory root fibers occur among these dendrites. 

 The broken line represents the outer border of the vagal lobe. 



and the processes which penetrate the motor layer do not differ 

 essentially from the others. There is one type of cells, how- 

 ever, among these whose dendrites extend tangentially over a 

 very wide area (Fig. 16, b and Fig. 18, b). In one case (Fig. 

 13) a neurite from a cell was seen to enter the secondary gusta- 

 tory tract; but its further course is unknown. Fig. 13 also 

 shows one of the smallest of these intrinsic cells whose thorny 

 dendrites are sharply contrasted to the very delicate much 

 branched neurite (neuropodium), giving the cell the character- 

 istic form of GoLGi's type II. 



This is apparently the most frequent type of these intrinsic 

 cells, though the neurite is rarely impregnated in recognizable 

 form. Fig. 6 illustrates a different form of this type of cell, 

 with cell body and dendrites among the endings of the deep 

 layer of root fibers and neuropodium between this layer and the 

 layer of secondary tracts. 



