. Bulletin. Natural history. Spirifer ' ollegheniensis PHYLOGENY OF CYRTOSPIRIFER IN THE APPALACHIAN PROVINCE Figures ctouf ^ noftirol siie. Mucrospirifer mucronotus Fig. 5. Inferred phylogeny of tlie species of Cyrtospirifer in the Catsldll 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 Peabody Museum of Natural History. New Haven, Peabody Museum of Natural History, Yale University

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Keywords: ., bookc, bookcentury1900, bookdecade1920, booksubjectnaturalhistory