. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. The above is Pilsbry's description. An authentic specimen drawn by Dr. Sterki is figured here. Vertigo ovata, Say. Of V. tridentata Sterki writes (The Nautibis, 1890, p. ): "It has a wide distribution in the northern part of the country ; originally found in Illinois, it has been collected in different parts of Ohio and New York, as well as in Minnesota and Colorado. In general it is remarkably constant in its characters ; yet there are slight differences ; here I found a few examples from low ground
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. The above is Pilsbry's description. An authentic specimen drawn by Dr. Sterki is figured here. Vertigo ovata, Say. Of V. tridentata Sterki writes (The Nautibis, 1890, p. ): "It has a wide distribution in the northern part of the country ; originally found in Illinois, it has been collected in different parts of Ohio and New York, as well as in Minnesota and Colorado. In general it is remarkably constant in its characters ; yet there are slight differences ; here I found a few examples from low ground, together with V. ovata; they were a trifle larger, with a thicker and deeper colored shell than those from upland ;. 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: ., bookauthorha, bookcentury1800, bookdecade1860, booksubjectzoology
