. An introduction to the study of zoology. Zoology. 2l8 AN INTRODUCTION TO ZOOLOGY. with two equal adductor muscles, include the Sinupal- lialia and also the cockles and the fresh-water tnussels. Fig. 71.—Shell of the Fresh-water Mussel, Anodtrnta cygma. Anodonta and TJnio, so abundant in our streams. The. 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 Lindsay, B. London, S. Sonnenschein

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1895