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In digging foundations, beds of round pebbles, mixed with small bivalve shells, are found; and according to the report of persons worthy of credit, there were discovered, thirty years ago, at the bottom of the ravine of San Juanillo, two enormous femoral bones, four feet long, and weighing more than thirty pounds.
We find the living brachiopoda so rare as to form about one forty-fourth of the whole bivalve fauna, whereas in the Lower Silurian rocks of which we are now about to treat, and where the brachiopoda reach their maximum, they are represented by more than twice as many species as the Lamellibranchiate bivalves.
Another peculiarity was noteworthy: their innumerable roots, long, fleshy, about the thickness of a large string, piercing the sand in every direction, and running down to high-tide mark, apparently enjoying the salt water, and often piercing through bivalve shells, which remained strung upon the roots. Have they a fondness for carbonate of lime, as well as for salt?
There are three varieties, spiral, univalve, and bivalve. In every salt-pan in the country there is a spring of water on one side. I can remember no exception to this rule. The water of these springs is brackish, and contains the nitrate of soda. In one instance there are two springs, and one more saltish than the other.
As I lay there deep in thought, I saw lying upon the beach before me a superb oyster, and as reflection makes me hungry I seized upon the bivalve and swallowed him. As he went down something stuck in my throat, and, extricating it, what should it prove to be but a pearl of surpassing beauty. My first thought was to be content with my day's find.
Instead of spades, we were obliged to use sharp bivalve shells from the shore, in digging places for the upright posts of the building, and as it was necessary that these should be set quite deep, in order to give it firmness and stability, the toil was severe.
The shuttle itself is sufficiently well known, but certain features of it, and to which it owes its efficiency, appear to call for some explanation. Its introduction dates back some years, during which time it has undergone certain modifications. It consists of a thick disk bobbin of thread, h, fitting loosely in a case constructed in the form of a bivalve, a and d.
Being only an ignorant bivalve, the clam did not know that what he had in his mouth was a very precious article, the "prize tail" of a beautiful cat. But having once taken hold of it, the clam was too obstinate to let go. Poor Zee jumped up and down, and ran around in circles, mewing with all her might.
Captain Nemo was evidently acquainted with the existence of this bivalve, and seemed to have a particular motive in verifying the actual state of this tridacne. The shells were a little open; the Captain came near and put his dagger between to prevent them from closing; then with his hand he raised the membrane with its fringed edges, which formed a cloak for the creature.
There are two kinds of oysters shipped from Chincoteague Inlet to New York and other markets. One is the long native plant the other, that transplanted from Chesapeake Bay: this bivalve is rounded in form, and the most prized of the two. The average width of Sinepuxent was only a mile.
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