A collection of land and fresh-water shells, principally from central, southern and southwestern Texas counties, with a few lots from Mexico, has been sent to me by Mr. C. D. Orchard, of San Antonio. Each lot was accompanied by ecological data; and since there were many intergrading forms, the following annotated list may be interesting and useful to field zoologists and systematists.
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Cheatum, E. P.
"An Annotated List of Snails from Texas and Northern Mexico Collected by C. D. Orchard,"
Field and Laboratory: Vol. 7
Available at: https://scholar.smu.edu/fieldandlab/vol7/iss1/3