Art. II.] Herrick, Gustatory Paths in Fishes. 49 



The general arrangement of the chief secondary neurones 

 may be understood by reference to Fig. 7, drawn from a sagit- 

 tal section of a young carp, where these cells are richly impreg- 



■Fig. 6. Transection through the vagal lobe of Catastomiis commersoni. 

 GoLGi method. X 40- 



The section illustrates the endings of the superficial and deep layers of root 

 fibers of the vagus and the position of the chief secondary gustatory neurones 

 (c.s.g.n.). An intrinsic neurone of type II is shown with dendrites in relation 

 with the termini of the deep root. Two neuroglia cells of the superficial series 

 are drawn and several of the deeper series (some of the latter having been drawn 

 from an adjacent section), h.v., blood vessel ; m.r., motor root of the vagus ; 

 s.g.t., secondary gustatory tract ; sp. V, spinal V tract. 



