TUB T'jIU'LLkj. 



147 



( > u r n:iii\ ad mostly in winl ially on 



the low sandy shores of Ca] I T 



[ts batteries and nerves are substantially as in the Euro 

 pean Bpi cies. The elecl rical organs arc consl racted on the 

 prinoiplo of a Voltaic pile, consisting of t 



Fiq. 189.— Rcy'a eglanteria, male. Mouth and gill-slits jaws and teetl 



batis Mit 



of Bix-sided cells, the space between the numerous fine 

 transverse plates in the cells filled with ;i trembling jelly- 

 like mass, each cell representing, so to speak, a Leyden jar. 

 There are about 11 lis in each battery, each provided 

 with nerves sent otT from the fifth and eighth pairs 

 nerves. The dorsal side <>f the apparatus is positively i 

 trical, the ventral side negatively so. The electrical cur- 

 rent passes from the dorsal to the ventral side. When the 



