Description: English: Electric eel, battle with Horses. Date: 1859. Source: Alexander von Humboldt: Alexander von Humboldt's Reise in die Aequinoctial-Gegenden des neuen Continents. Nach der Anordnung und unter Mitwirkung des Verfassers. Author: Alexander von Humboldt (text); James Hope Stewart (drawing); William Home Lizars (engraving).
Description: English: Cross-section of electric eel, then called "Gymnotus electricus", by John Hunter, 1775. The electric organs are labelled "H" for the main organ (that stuns the prey), and "I" for what is now called Hunter's organ, that assists the main organ. The vertebral column is shown at the centre, and the large swimming muscles of the back are marked "C". Date: 1775. Source: https://archive.org/details/philtrans01229060/page/n25/mode/2up. Author: John Hunter.