. Bulletin - United States National Museum. Science. 314 A MANUAL OF AMERICAN LAND SHELLS. Avhite, tootb-like process placed obliquely to the axis of the shell; peri- stome white, thickeued, widely reflected, and sometimes grooved on its face, its exterior yellowish; umbilicus exhibiting only one volution, Fig. 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 United States National Museum; Smithsonian Institution; Unit
. Bulletin - United States National Museum. Science. 314 A MANUAL OF AMERICAN LAND SHELLS. Avhite, tootb-like process placed obliquely to the axis of the shell; peri- stome white, thickeued, widely reflected, and sometimes grooved on its face, its exterior yellowish; umbilicus exhibiting only one volution, Fig. 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 United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
