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Updated: June 23, 2025
It follows that, after the upper valve of the Crania fell off, the surface of the attached valve must have remained exposed long enough to allow of the growth of the whole coralline, since corallines do not live embedded in mud.
Such are the corals; those corallines which are called Polycoa; those creatures which fabricate the lamp-shells, and are called Brachiopoda; the pearly Nautilus, and all animals allied to it; and all the forms of sea-urchins and star-fishes.
These different kinds differ also in colour, and thus present a beautiful appearance when seen at the bottom of clear and shallow water. In regard to the rate at which the corallines build their cells there is some diversity of opinion some asserting that the process is imperceptible, while others state as positively that it is rapid.
In the meantime, the Fuci and Algæ, with the Corallines and Madrepores, would transform themselves into fish, and gradually populate all the submarine portions of the globe. Although the writers of this delicious drollery seem to have had Dr.
The maximum length is three miles by about the same breadth, and the circumference, including the indentations, may be fifteen. The surface is rolling composed of humus and clay, corallines and shelly conglomerates based on tertiary limestone and perhaps sandstone; dwarf clearings alternate with tracts of bush grass, and with a bushy second growth, lacking large trees.
Notwithstanding their webbed feet, they managed to perch securely among the branches, many of which were so heavily freighted, that they bent almost to the ground beneath their load. Finding a spot where the beach shelved off gradually into deep water, with a smooth, firm bottom, free from shells and corallines, we had a refreshing swim.
In the polypi, corallines, &c., individuality is in its first dawn; there is the same shape in them all, and a multitude of animals form, as it were, a common animal. And as the individuals run into each other, so do the different genera. They likewise pass into each other so indistinguishably, that the whole order forms a very network.
As, however, the sea is sometimes unfathomable close to those islands, it has been supposed that the submarine islands on which the corallines began to build have gradually subsided, and that, as they did so, the insects always built a little more, so as to keep the top of their structures on a level with the sea. Above the sea they cannot build.
The calcareous matter is altered to the depth of about a foot beneath the line of junction; and a most perfect gradation can be traced, from loosely aggregated, small, particles of shells, corallines, and Nulliporae, into a rock, in which not a trace of mechanical origin can be discovered, even with a microscope. Where the metamorphic change has been greatest, two varieties occur.
Cox's for some more tissue paper, and begin the work again. This was very provoking to Edith. "To have spent all the morning and now to be going to spend all the afternoon over a trumpery balloon, which you can't make after all, Miss Schomberg, is very tiresome, and I wanted to go to old Joe Murray's to-day and see if the children have picked me up any corallines."
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