. First lessons in zoology. Zoology. 142 FIRST LESSONS IN ZOOLOGY clambake, is found in all the northern seas of the world. . All along the coasts of the eastern States every sandy shore, every mud flat, is full of them, and from every village and hamlet the clam-digger goes forth at low tide to dig these esculent bivalves. The clams live in deep burrows in the firm mud or sand, the shells some- times beintr a foot or fifteen inches below the 105, — A gnjup uf marine Pacific Coa^t molluscs; in upper left-hand corner, Purpura saxicola; next to the rijjht, Littorina scutulata; fa
. First lessons in zoology. Zoology. 142 FIRST LESSONS IN ZOOLOGY clambake, is found in all the northern seas of the world. . All along the coasts of the eastern States every sandy shore, every mud flat, is full of them, and from every village and hamlet the clam-digger goes forth at low tide to dig these esculent bivalves. The clams live in deep burrows in the firm mud or sand, the shells some- times beintr a foot or fifteen inches below the 105, — A gnjup uf marine Pacific Coa^t molluscs; in upper left-hand corner, Purpura saxicola; next to the rijjht, Littorina scutulata; farthest to ri<;ht, limpets. Afmara spi-(irnm; left-hand lower corner, Mylilus inhforjiiniuis; in riudil-hand lou-er corner the black shells just alwve the larLje clam-shell. Clihiriislniiiiiiii fuiu-bral,:. (Natural size; from livmi^ specimens in a tide-po(j| on the Hay of ^hjnterey, California.) When the flats are covered with water his clamship ex- tends his long siphon uj) through the burrow to the surface of the sand, and through one of these tubes the water and its m)'riads of animalcules is drawn down into the shell, furnishing the gills with \'gen and the mouth \\itli food, and then tlic \\;iter charged with carbonic acid and reftise is forced out of tlie other siphon. When the tide ebbs the siphons arc closed and parti)- with- 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 Kellogg, Vernon L. (Vernon Lyman), 1867-1937. New York, H. Holt and Company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1903
