TEEMINATION OP NERVES IN THE LIVER. 457 



opinion being at the same time strengthened by the fact that 

 the cell network is coloured deep violet. The trabeculse of the 

 reticulum in such cases as this are very much more slender 

 than they are as ordinarily demonstrated, but an exception is 

 to be made of cases like that in the figure, where the trabeculse 

 become thickened along two or more lines so as to give the 

 intracellular nerve-twig the appearance of a branching which 

 extends toward the nucleus. In fig. 6, however, the reticulum 

 is formed of trabeculse nearly as coarse as that usually observed 

 in the cell. 



The demonstration of the simple intracellular termination 

 occurring in the same cell with the more complicated form is 

 apparently not possible. The former, if such is present when 

 the other mode of termination is demonstrated, must necessarily 

 be obscured by deep violet colour of the cell reticulum ; if this 

 depth of tint be lacking it is possible to see the simpler termi- 

 nations. Both forms are often demonstrated in the same 

 section, and therefore one cannot consider that the method of 

 hardening previous to treatment with gold chloride may account 

 for the presence of the one or the other on the ground of their 

 being artificially produced. 



It is probable that every hepatic cell in Necturus presents 

 both forms of termination ; otherwise we ought to conclude 

 that there are two kinds of specifically difl'erent glandular cells in 

 the liver according to the doctrine of the physiological homo- 

 dynamy of nerves. The simpler form of termination may be 

 regarded as the same as that found in the cutaneous epithelium 

 of the tadpole,^ while the more complicated mode is apparently 

 the glandular one. At present it is useless to discuss further the 

 specific function of these, but I hope in a future paper on nerve 

 terminations to treat more fully this aspect of the question. 



General. 



In the liver of Necturus there is a mode of nerve termina- 

 tion which I have been unable to demonstrate in the human 



' This Journal, November, 1885, p. 53. 



