. Contributions to the natural history of the United States of America. Zoology; Chelonia (Genus); Ctenophora; Cnidaria; Animals. EMBRYOLOOr OF TURTLES PI XVIII. ^*Sii«ai^iiiiai^ Soixrfl k Clark from nat A Stmrei on Jtone I. ft Co print Vitelline and allantoidian circulation. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Agassiz, Louis, 1807-1873. Boston, Little, Brown and Company; London, Trübner & Co.

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Keywords: ., bookcentury1800, bookdeca, booksubjectanimals, booksubjectzoology