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Popular Science Monthly/Volume 22/April 1883/Progress of the Backboned Family - Wikisource, the free online library
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Fourteen weeks in zoology. Zoology. Fig. 317. PastinSca hmtata, StiEg Eay. Raiidae.—The Rays are noted for their enormous pec- toral fins, formidable tail, and tesselated teeth. They some- times weigh half
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Popular Science Monthly/Volume 22/April 1883/Progress of the Backboned Family - Wikisource, the free online library
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