. Bulletin. Natural history; Natural history. 142 Illinois Natural History Survey Bulletin Vol. 23, Art. 1. SIlUii .503 CONSIMILIS 504 SPATULATA 505 ALBICORNIS. 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 Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division

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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory