. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Fig. 19. Median dorsoventral sections through the initial shells of Gonia- tites (Paragoniatites) newsomi Smith from the Mississippian (a), and Polyptychites sp. from the Lower Cretaceous (&). (After Schindewolf 1939a.). 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Mus

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. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Fig. 19. Median dorsoventral sections through the initial shells of Gonia- tites (Paragoniatites) newsomi Smith from the Mississippian (a), and Polyptychites sp. from the Lower Cretaceous (&). (After Schindewolf 1939a.). 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum

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Keywords: ., bookauthorharvarduniversity, bookcentury1900, booksubjectzoology