400 



ELECTRO-PHYSIOLOGY 



CHAP. 



this compartment there is " a special, disc-shaped, integumental 

 expansion," which Bilharz (3) was the first to recognise for the 

 electromotive element proper, the terminal expansion of a twig of 



p x P 



FIG. 260. Mulapternrus electriciis. Portion of L.S. through the organ, showing the spar. *_(/') buumli'il 

 by septa of connective tissue ; an electrical plate is attached to each posterior wall (P) ; NP 1 = 

 plate with nerve-stalk. (Fritsch.) 



nerve, the electrical plate, analogous in all respects with the many 

 tissues of similar structure and composition in the other electrical 

 organs. Each of these is attached to the posterior wall of its 



