. A textbook in general zoology. Zoology. CLAMS, OYSTEKS, AND MUSSELS 113. the mud within reach of the sea water. In this pooition a stream of sea water carrying food and air goes down one tube, is ehiven through the gills, ^=^ -, and finally back up the othei tube to be poured into the sei above. Oysters. —They are similar m structure to a mussel, except that they have no foot, or only a rudimentary one, anil no siphons and the valves of the shell aie unequal. One valve is hollowed out to receive the body of tht oyster, and the other valve is nearly flat. Usually the hollo\\ valve is attached
. A textbook in general zoology. Zoology. CLAMS, OYSTEKS, AND MUSSELS 113. the mud within reach of the sea water. In this pooition a stream of sea water carrying food and air goes down one tube, is ehiven through the gills, ^=^ -, and finally back up the othei tube to be poured into the sei above. Oysters. —They are similar m structure to a mussel, except that they have no foot, or only a rudimentary one, anil no siphons and the valves of the shell aie unequal. One valve is hollowed out to receive the body of tht oyster, and the other valve is nearly flat. Usually the hollo\\ valve is attached to some' sub merged object. They Hve all along the Atlantic coast south ot Cape Cod, and along the Gulf coast. Oysters are, probabh most extelisively grown in the Chesapeake Bay. Their eggs which are produced in greit c^uantities, soon hatch, and, aftei a few days of a free-swimming life, the young oysters attach themselves to some objects, usually old shells, and begin growing in earnest. It takes an oyster from three to five years to become of marketable size. In making artificial beds, old shells, pieces of earthenware, and slate are throwm into the water for places of attachment for the oysters. Oysters live on minute plants and animals found in fresh hekkick's zool. —8. 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 Herrick, Glenn W. (Glenn Washington), 1870-1965. New York, Cincinnati [etc. ] American Book Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1912
