National Encyclopedia : A Dictionary of Universal Knowledge by writers of eminence in Literature, Science and Art, V.6
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Issue Date
c.1880
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Abstract
Engraving of four fish and two head views : " 1.Polypterus bichir" ; "2-4. Acipenser sturio_Common sturgeon" ; "3.Upper surface" ; "4.Under surface" ; "5.Acipenser ruthenus_Sterlet" ; "6.Polydon folium_Paddle fish". Heading at top of print "Ganoidei".