. Elements of zoölogy : a textbook. Zoology. A living Mollusk—expanded. soon disappear, and only the shell remains. Curious and wonderful as the shells are, they often give only the FIG. 525. faintest idea of the appearance of the animals when alive. The shell is a part of the animal, and not a mere house which it enters and leaves at pleasure ; although the so-called animal readily expands Mollusk dead-or contracted. much beond the ]imitg Qf thig. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appeara


. Elements of zoölogy : a textbook. Zoology. A living Mollusk—expanded. soon disappear, and only the shell remains. Curious and wonderful as the shells are, they often give only the FIG. 525. faintest idea of the appearance of the animals when alive. The shell is a part of the animal, and not a mere house which it enters and leaves at pleasure ; although the so-called animal readily expands Mollusk dead-or contracted. much beond the ]imitg Qf thig. 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 Tenney, Sanborn, 1827-1877. New York : Scribner


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