. Animal biology. Zoology; Biology. Fig. 143.—Mollusca of considerable economic importance. A, shell of the edible oyster, Ostrea virginiana. B, shell of a fresh-water clam, Lampsilis sp., from which pearl buttons have been cut. C, shell of a snail from which many cameos are made by cutting the design in one layer and allowing it to remain affixed to the underlying layer of a different color. D, shell of a Japanese oyster, Meleagrina sp., showing a "cultured ; success of experiments in artificial propagation now being conducted. Fresh-water mussel shells purchased by manufactur
. Animal biology. Zoology; Biology. Fig. 143.—Mollusca of considerable economic importance. A, shell of the edible oyster, Ostrea virginiana. B, shell of a fresh-water clam, Lampsilis sp., from which pearl buttons have been cut. C, shell of a snail from which many cameos are made by cutting the design in one layer and allowing it to remain affixed to the underlying layer of a different color. D, shell of a Japanese oyster, Meleagrina sp., showing a "cultured ; success of experiments in artificial propagation now being conducted. Fresh-water mussel shells purchased by manufacturing plants in 1936 amounted to 58,484,000 pounds. These were bought from 18 states in. 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 Wolcott, Robert Henry, 1868-1934; University of Nebraska (Lincoln campus). Dept. of Zoology. New York ; London : McGraw-Hill Book Company, Inc.
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Keywords: ., bookcentury1900, bookcoll, booksubjectbiology, booksubjectzoology
