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Hammerhead, Sphyrna zygaena, Zygene marteau, and smooth hound shark, Mustelus mustelus, Emissole commune. Handcoloured copperplate stipple engraving from Jussieu's 'Dictionnaire des Sciences Naturelles' 1816-1830. The volumes on fish and reptiles were edited by Hippolyte Cloquet, natural historian and doctor of medicine. Illustration by J.G. Pretre, engraved by Talbeau, directed by Turpin, and published by F. G. Levrault. Jean Gabriel Pretre (1780~1845) was painter of natural history at Empress Josephine's zoo and later became artist to the Museum of Natural History. (Photo by: Florilegius/Universal Images Group via Getty Images)