. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. /"V Desmoinesian '.* —jLepta^J ;-•., \ \/ \ / wyo'mLn'g'~ / \y \ '. yglossbidea- V. \ / N\ M. Virgilian « • J> ., \ mtopetlna arbala-M\ssb\ir'\Qn. Fig. 4. Eange in values (shown by quadrilaterals) and mean values (black dots) of the alpha and beta angles of species of Myalina from Penn- sylvanian and Lower Permian rocks of the midcontinent region (data from Newell, 1942).. Please note that these images are extracted from scanned page images that may have been digitally enhanced

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. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. /"V Desmoinesian '.* —jLepta^J ;-•., \ \/ \ / wyo'mLn'g'~ / \y \ '. yglossbidea- V. \ / N\ M. Virgilian « • J> ., \ mtopetlna arbala-M\ssb\ir'\Qn. Fig. 4. Eange in values (shown by quadrilaterals) and mean values (black dots) of the alpha and beta angles of species of Myalina from Penn- sylvanian and Lower Permian rocks of the midcontinent region (data from Newell, 1942).. 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