. Elementary zoology. Zoology. BRANCH CCELENTERATA: THE POLYPS, ETC. 105 animals, but they are the most important, as far as its subsequent history goes. As the bank slowly rises by their growth, it at last approaches the surface of the water, and at low tide the tips of the growing branches of coral are exposed to the air. This, however, only takes place in sheltered localities, for long before it has reached this elevation it has begun to be more or less. Fig. 17.—Skeleton of a branching coral, Madrepora cervicomis. (From specimen.) changed and broken by the force of the waves. As the submar
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. Elementary zoology. Zoology. BRANCH CCELENTERATA: THE POLYPS, ETC. 105 animals, but they are the most important, as far as its subsequent history goes. As the bank slowly rises by their growth, it at last approaches the surface of the water, and at low tide the tips of the growing branches of coral are exposed to the air. This, however, only takes place in sheltered localities, for long before it has reached this elevation it has begun to be more or less. Fig. 17.—Skeleton of a branching coral, Madrepora cervicomis. (From specimen.) changed and broken by the force of the waves. As the submarine bank approaches the tide level, the delicate branching forms have to meet a terrific wave-action. Fragments of the branching corals are broken off from the bank by force of the waves, and falling down into the midst of the growing coral below fill up the interstices, . 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 work.. Kellogg, Vernon L. (Vernon Lyman), 1867-1937. New York : H. Holt and company