: : B l, 



Fig. 





-liiam of such a cell as tliat represented in Fig. 395. 



showing the principal lines which diverge from the fibres 



ie point where they become continuous with the sub- 



stance of the cell. These lines may be traced from auy 



FIBRE, ACROSS THE SKI i.. and one or more of them may 



-Ilowed into FVERY OTHER FIBRE which proceeds from 



the cell. 



Fig. 393. 



Diagram to show the course of the fibres which leave the caudate 

 nerve cells a, a ^re parts of two nerve cells, and two entire cells 

 are also represented- Fibres from several different cells unite to 

 form single nerve fibres. 666 In passing towards the periphery 

 these compound fibres divide and sub-divide, the resulting sub- 

 divisions passing to different destinations The fine fibres resulting 

 from the subdivision of one of the caudate processes of a nerve 

 cell may help to form a vast number of dark-bordered nerves, but 

 it is, I think, certain thai NO SINGLE PROCESS EVER FORMS ONS ENTIRE 



AXIS-CYLINDER 



Fig. 399. 



Diagram to show tlie possible relation to one another of 

 various circuits traversing a single caudate nerve cell. 

 a maybe a circuit connecting a peripheral sensitive surface lhe ma nner in which plexuses or networks 



he cell ; 6 may be the path of a motor impulse : c and - fibres are formed- The course of the numerous 



r circuits passing to other cells 01 other penphei al nerve currents TO and FROM the trunks, is indicated by the 

 parts A current passing aloni a dotted lines, a, a, a, a. dark-bordered nerve fibres 



1 . 



[To follow PL. LXIV 



