THE LIVING STRUCTURES 



123 



habitation with which to move through the water like a 

 fish and have also built up in it electric storage batteries, 





Fig. 18. A Torpedo-Ray with the electric organs dissected out. On the right 

 the surface only of the electric organ (oe) is shown. Oh the left the nerves 

 passing to the organ are dissected out. The roof of the skull is removed to 

 bring the brain into view. br. branchiae /, spiracle; o, eyes; tr, trigeminal; tr', 

 its electric branch; v. vagus; I, fore-brain; II, mid-brain; III, cerebellum; IV, 

 electric lobe. 



in which it is able to collect and keep enough of elec- 

 tricity to give a powerful electric shock to its prey or 

 enemies. Think of all the experimenting that must have 



