. Seaside studies in natural history. Marine animals. MADEEPORIAJ^S. 17 Fig. title, because any account of tlie Radiates, from wiiicli so impor- tant a group as tliat of the corals was excluded, would be very incomplete. This pretty coral of our Northern waters is 110 reef-builder, and does not extend farther south than the shores of North Carolina. It usually es- tablishes itself upon brok- en angular bits of rock, lying in sheltered creeks and inlets, where the vio- lent action of the open sea is not felt. The presence of one of these little commtmities on a rock may first be detected b
. Seaside studies in natural history. Marine animals. MADEEPORIAJ^S. 17 Fig. title, because any account of tlie Radiates, from wiiicli so impor- tant a group as tliat of the corals was excluded, would be very incomplete. This pretty coral of our Northern waters is 110 reef-builder, and does not extend farther south than the shores of North Carolina. It usually es- tablishes itself upon brok- en angular bits of rock, lying in sheltered creeks and inlets, where the vio- lent action of the open sea is not felt. The presence of one of these little commtmities on a rock may first be detected by what seems like a delicate white film over tlie surface. This film is, however, broken up by a number of hard calcareous deposits in very regular fOrm (Fig. 20), circular in outline, but divided by niimerous partitions running from the outer wall to the centre of every such circle, where they unite at a little white spot formed by the moiith or oral opening. These circles represent, and indeed are themselves the distinct individuals (Fig. 17) composing the community, and they look rig. n. not unlike the star-shaped pits on a coral head, formed by Astrseans. Unlike the massive compact kinds of coral, however, the indi- viduals multiply by bud- ding from the base chiefly, never rising one above the other, but spreading over the surface on which they have established selves, ones. In consequence of this mode of growth, such a commu-. 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 Agassiz, Elizabeth Cabot Cary, 1822-1907; Agassiz, Alexander, 1835-1910, joint author. Boston, J. R. Osgood and Company
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectmarineanimals, bookye
