NERVE J^IBRES AND NERVE CELLS. 



103 



direction awa}' from the muscles to which they are dis- 

 trihuted, they will be found, sooner or later, to terminate 

 in (jdiHilld (fig. 24 A. fil.c ; fig. 25, (fn. 1 — 13.) A gan- 

 glion is a body wliich is in great measure com2)osed of 



Fig. 24-. — Astaous ffiifi/rfUi.^i. — A, one of the (double) abdominal gan- 

 glia, with the nerves connected with it ( x 25) ; B, a nerve cell or 

 gangiionio corpuscle ( x 250). a. sheath of the nerves ; c, sheath 

 of the ganglion ; co, co', commissural cords connecting the ganglia 

 with those in front, and those behind them, r/l.c. points to the 

 ganglionic corpuscles of the ganglia ; n, nerve fibres. 



nerve fibres ; but, interspersed among these, or disposed 

 around them, there are peculiar structures, which are 

 termed ganglionic corpuscles, or nen-e cells (fig. 24, B.) 

 These are nucleated cells, not unlike the epithelial cells 

 Avliich have been already mentioned, but which are larger 



