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Placoides   Listen
noun
Placoides  n. pl.  (Zool.) A group of fishes including the sharks and rays; the Elasmobranchii; called also Placoidei.






Collaborative International Dictionary of English 0.48








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"Placoides" Quotes from Famous Books



... allied to Palaeoniscus (called also Palaeothrissum), lies buried beneath the Jura formations in the old carboniferous strata. Scales which, in some fishes, as in the family of Lepidoides (order of Ganoides), are formed like teeth, and covered in certain parts with enamel, belong, after the Placoides, to the oldest forms of fossil fishes; their living representatives are still found in two genera, the 'Bichir' of the Nile and Senegal, and the 'Lepidosteus' ...
— COSMOS: A Sketch of the Physical Description of the Universe, Vol. 1 • Alexander von Humboldt



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