Bland, T. (1861). Remarks on certain species of North American Helicidae. Annals of the Lyceum of Natural History of New York. 7(30): 420-446 (Dec. 1861), 7(31): 447-448, plate 4 (Feb. 1862).
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Bland, T.
1861
Remarks on certain species of North American Helicidae.
Annals of the Lyceum of Natural History of New York