. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 268 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY detectable alteration in the course of what must be ten-million- year intervals, whereas the complexly organized crinoids display profound and generally rapid evolutionary change. A satisfac- tory rating of late Paleozoic invertebrate groups according to. Fig. 5. Inferred phylogenetic relations of some Pennsylvanian and Lower Permian myalinid species from the midcontinent region, based largely on data illustrated in Figures 3 and Please note that these images are extrac

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. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 268 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY detectable alteration in the course of what must be ten-million- year intervals, whereas the complexly organized crinoids display profound and generally rapid evolutionary change. A satisfac- tory rating of late Paleozoic invertebrate groups according to. Fig. 5. Inferred phylogenetic relations of some Pennsylvanian and Lower Permian myalinid species from the midcontinent region, based largely on data illustrated in Figures 3 and 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