D. ELECTRIC ORGANS. 



ELECTRIC organs are present in certain Fishes, and are most 

 strongly developed in a Ray (Torpedo marmorata), found in the 

 southern seas, in a South American Eel (Gymnotus electricus) 

 and in an African Siluroid (Malapterurus electricus). 

 Gymnotus, the electric Eel, possesses by far the strongest electric 



FIG IQQ. Torpedo marmorata, WITH -nir. Ki,r.n IMC OKGAK (E) EXI-OSKD. 

 S, skull ; ,S>, spiracle ; KK, gills; An, eye. 



power, next to it comes Malapterurus, and then Torpedo. The 

 electric batteries of these three Fishes are situated in different, 

 parts of the body ; in Torpedo they have the form of a broad 

 mass, extending throughout the substance of that part of the 

 boilv lying bet\vmi the gill-sacs and the prqpterygium on each 



