The generic character of this very large portion of bivalves is, shell bivalve, usually with unequal valves: hinge without teeth, having a hollow cavity or sinus, and sometimes grooved.
Such Rockaways and other bivalves are to be found nowhere else.
Never heard of bivalves before in my whole life, but the other puts me in mind of old Grandma Frost's splint-bottomed rocking-chair.
But these bivalves and Rockaways--what do they do with them?
All bivalves that live in the sand have shells which gape more or less, apparently to enable them to push their syphons through the sand to the water.
Under the native name of Toheroa, a factory at Dargaville preserves these bivalves in tins.
Even such solid bivalves as the Dosinia will be carried skywards by the gulls and dropped on to a hard part of the beach, so that the shells may be cracked and the gulls get the contents.
When the tide is flowing it is a very common sight to see great numbers of thesebivalves washed up by the surf from their beds, and it is very interesting to watch the speed with which they can bury themselves again.
In half an hour he had deposited three pails of what seemed to be very fair bivalves in a pile near the fire.
On the leaves, also, various shells, uncovered molluscs, andbivalves are attached.
The ravages of parasitic animals (Trematodes) in the internal organs of snails and bivalves are well known to zoologists.
I am indebted to Herr Clessin—the celebrated student of our mollusca—for some valuable notes upon our indigenous snails and bivalves (Lamellibranchiata).
In the first place, is it not most remarkable that if the ducks had discovered that the bivalves could not live in fresh water, they should not also have discovered that they could not live in the air?
The bivalvesare all aquatic, and many bury themselves in the sand or mud by means of a fleshy, muscular foot.
In the Secondary or Cainozoic formations the preponderance of the higher grade of bivalves becomes more and more marked, till in the tertiary strata it approaches that observed in the living creation.
Among the peculiar lamellibranchiate bivalves common to the Plymouth limestone of Devonshire and the Continent, we find the Megalodon (Figure 517).
A system of apportionment gives every man in a boat an interest in the take, the divers generally retaining two thirds of the bivalves granted them by the government rule controlling the fishery.
Moor merchants, and local hawkers, hoping to get a few thousand bivalves at a price assuring a profit when peddled through the coastwise villages.
They dive in this way a dozen times in succession, which gives an average of between thirty and forty bivalves to each diver.
Along the shores of the Channel and in the Mediterranean there are few bivalves more abundant than the several species of the genus Donax.
The Chinese, and other Eastern nations, are said to turn this fact in the natural history of bivalves to practical use in making pearls and cameos.
Most of the bivalves are supplied with nacre; some of them even yield a blue, or blue and violet pigment.
Bivalves move about and change from place to place by means of an extensible fleshy organ called, from some of its functions, a foot; in fact, it has less resemblance to a foot than to a large tongue.
These bivalves have the singular power of leaping to a considerable height and then throwing themselves to a distance of ten or twelve inches--a spectacle which may be witnessed any day at low water.
As examples, we note several species of these bivalves for representation.
The arrangement of bivalves now most generally adopted in England is that of Woodward, as developed in the last edition of his manual of the mollusca; it is greatly based on that of Lamarck.
Natica is very abundant on some sandy beaches, where it devours small bivalvesand other animals; and it is frequently washed up alive by the waves.
It may be noted, in conclusion, that all the species of this genus have the power of swimming rapidly by flapping their valves--a mode of locomotion very common among the bivalves especially during an early stage of their existence.
Evidently he did not mean to take any chances of having the precious bivalves stolen by the prowling half-grown wild boy.
Steve Dowdy, as he took one of the long-shaped bivalves in his eager hands, the better to examine it.
Finding that his method of trying to open the stubborn bivalves was awkward, as they could not be handled like oysters, Max took a second knife.
And if we can only persuade the young gentleman who opens the bivalves to refrain from washing the grit off each in the tub of dirty water behind the bar, so much the better.
More tragic still was my experience of the bivalves procurable at Aden--which cinder-heap I have always considered to be a foretaste of even hotter things below.
And above all, the bivalves should be opened on the deep shell, so as to conserve some of the juice; for it is advisable to get as much of the bivalve as we can for the money.
In all probability the entire lot which were carried away upon the schooner were not worth as much as the same quantity of bivalves from Chesapeake Bay.
It was hard work to get some of the thick, ridgy bivalves apart, but when they succeeded they rarely failed to be rewarded munificently.
There are some very curious genera ofbivalves that bore their way into the hardest rock and [pg314] there find a comfortable shelter for life.
One of the most abundant bivalves in Florida, often cast in thousands upon the beaches.
In bivalves the eggs are retained within the parent shell until hatched, and the young, which then escape into the water, are very different-looking creatures from the parent.
Many bivalves secrete similar bodies, but as they have the nature of the shell, those produced by mollusks having lusterless interiors are of no value.
The characteristic feature of this group of bivalves is the filamentous gill, that is, a gill with the filaments long, doubled back, and united to each other only by ciliary junctures.
Of the great number of bivalves to be found upon our own shores we can only mention briefly some of the commonest species.
Most bivalves having a strong byssus exhibit a feeble development of the foot; nearly all bivalves, however, show traces, sometimes only in the embryo, of a byssal gland.
There is another family of rock- and mud-boring bivalves which superficially resemble the petricolas, but their anatomical organization removes them to a little distance from the /Petricolidae/.
The eyes are not highly developed organs, but they nevertheless appear to be very sensitive to light, for the bivalves which are so endowed will, when kept in aquaria, instantly close their shells when the shadow of a fish passes over them.
When cool, your bivalveswill be gaping open; simply scrape them clean.
The odd shapes assumed by many bivalves is well illustrated in the hammer oyster (Fig.
The little oyster crab found in bivalves is a familiar form.
Bivalves were formerly classified in conchology as Acephala, because they have no proper head, but at the posterior end are two openings of tubes, provided with cilia.
The Bivalves (Lamellibranchiata) of the Devonian call for no special comment, the genera Pterinea and Megalodon being, perhaps, the most noticeable.
Having the two sides unequal, as in the case of the shells of the ordinary bivalves (Lamellibranchiata).
Whilst the Lamp-shells are slowly declining, the Bivalves (Limellibranchs) are greatly developed, and are amongst the most abundant and characteristic fossils of the Cretaceous period.
Jacobson, of Copenhagen, wrote, in or about 1830, a memoir to show that the young bivalves which are found in the external branchial processes of the Anadontae are parasites, and he proposed for them the name of Glochidium.
They begin to appear in the Devonian, in the shallow fish-banks and the Anodon-like bivalves found with fossil plants.
Passing over the ordinary bivalves and sea-snails, which in the main conform to those of our own time, we find perhaps the most wonderful changes among the relatives of the cuttle-fishes and Nautili.
You will recollect," addressing my companion, "that in the muddy pond we have just left, we chiefly got small bivalves and only a few snail shells.
With patience and a little skill, bivalves as small as Cyclas cornea may be treated in this way.
Bivalves may be found by digging in the sand, or mud, on a beach, or at the mouth of a river: their presence is generally indicated by a circular breathing hole in the sand.
Bivalves generally at the bottom, among stones, or buried in the sand, or among the roots of aquatic plants.
These, of course, are closely connected with the land shells, which the bivalves are not.
When bivalves gape on dying in water, or if the ligament be broken, the valves should be closed and tied together.
The former are univalves and the latter bivalves having two shells for protection.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "bivalves" in a variety of sentences. We hope that you will now be able to make sentences using this word.
