. Fourteen weeks in zoology. Zoology. 254 SUBKINQDOM MOLLUSCA. to cover up with nacre any irritating substance, as a grain of sand, that may have gotten beneath the mantle.* The Hammer Oyster of the Indian Ocean presents one of those singular forms seemingly designed to puzzle natural- Fig. MalUus vulgSHs, Hammer-oyster. ists in endeavoring to account for the utility of the anomalous appendages. other like shingleH, rach one indicating a eeasonV growtli and the seriee showing the oyster's age. In three or four years a marlcetable size will be reached. The little r(-d crab often found shar
. Fourteen weeks in zoology. Zoology. 254 SUBKINQDOM MOLLUSCA. to cover up with nacre any irritating substance, as a grain of sand, that may have gotten beneath the mantle.* The Hammer Oyster of the Indian Ocean presents one of those singular forms seemingly designed to puzzle natural- Fig. MalUus vulgSHs, Hammer-oyster. ists in endeavoring to account for the utility of the anomalous appendages. other like shingleH, rach one indicating a eeasonV growtli and the seriee showing the oyster's age. In three or four years a marlcetable size will be reached. The little r(-d crab often found sharing the oyster's home is the rinnoMres oflrSum. The female is generally seen, as the male is scarce. The latter has its back ornamented ivilh a white figure vei-y like an anchor.—At the discovery of America the oyster wa^ abundant upon the Atlantic coast. Immense mounds of shells lie along the shore, from Maine to Florida. They antedate the time of the Indian, and are so large that in Florida, during the late war, some were used as forts. See Lockwood's''Natural Histoid of an Oyster," in Pcqrular Science MontMy^'^OYQva- her, * Taking advantage of this, the Chinese have long been in the habit of producing pearls artificiallv by i-lipping metal images under the mantle and then releasing the animals. In six months the figures are found overlaid with a pearly secretion. Sometimes, however, the erafly Celestials paste these images upon the interior of a dead shell and then paint it over with a mixture of powdered '' mother of pearl," in exact imitation of 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 Steele, Joel Dorman, 1836-1886. New York, Chicago [etc. ] A. S. Barnes & Company
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1872
