Physonectae; similar to the siphons but without a mouth, and purely tactile in function, hence sometimes termed dactylozoids.
In their most primitive form they are seen in Velella as "gonosiphons," which possess mouths like the ordinary sterile siphons and bud free medusae.
The siphonshave been compared to the manubrium of a medusa-individual, or to polyps, and hence are sometimes termed gastrozoids.
Shell thin, gaping widely at the posterior end; anterior adductor much reduced; mantle extensively closed; siphons long, united.
Mantle with a fourth aperture; siphons long, quite separate, completely retractile and invertible.
Siphons united for the greater part of their length, and with a circlet of tentacles near their extremities; foot reduced; shell gaping; ligament internal.
Lateral view of a Mactra, the right valve of the shell and right mantle-flap removed, and the siphons retracted.
Two pallial sutures, siphons somewhat elongated and partially or wholly united.
Mantle extensively closed; a fourth pallial aperture behind the foot; siphons long and united; shell elongated, a spoon-shaped projection for the ligament on each valve.
A fourth pallial aperture present; pedal aperture small; siphons very short and separate; shell fixed by the right valve, irregular.
Siphons very long and united; foot small; shell thin, with deep pallial sinus; fresh or brackish water.
The mantle is closed, the siphons short, and the foot small.
The Heart Cockle burrows in sand by means of its foot, going down just far enough to bury the whole of its shell, and always leaving its siphons exposed at the surface.
This is a large brown species, with seven siphons surrounded by a thick cellular layer which conceals the articulations and is too opaque to allow the siphons to be seen without dissection.
In the typical genus (Tellina), of which we represent two very common British species, the ligament is very prominent, and the slendersiphons are often much longer than the shell.
The mantle is open at the anterior end, and the siphons are either quite distinct or only partly united.
The foot is small and pointed, and the siphons fringed.
The mantle lobes are united, as are also the siphons to a greater or lesser extent; and there is only one gill on each side.
It has seven or eight parallel siphons in its fronds, all regularly arranged round a small central space.
To do this, take a bivalve in your hand, and hold it before you in such a position that the hinge is uppermost, and the siphons turned towards you.
The mantle lobes are united in front, except where the sucker-like foot passes through them; the gills are long and narrow, and extend into the siphonal tube; and the two very long siphons are united almost throughout their length.
The lobes of the mantle are fringed; the siphons are separate and diverging, but shorter and thicker than in most of the other Tellinidae, and the foot is comparatively large, flattened, and pointed.
The long siphons enable the animal to bury itself to quite a depth beneath the surface of the sand.
Next morning his siphons were stretched out some six inches in length.
Unlike the animals which we have been considering, these mollusks have no siphons and the shell is open all the way around save at the hinge, and the edge of the mantle is provided with little, round, black eyes.
The majority of clams live in the mud in a horizontal position, the anterior end being buried and the posterior end, containing the siphons which draw in and expel the water, being out of the mud, in the water.
I never thought before that there was any particular beauty to the siphons of a clam, but for this red-lined one my opinions quickly changed.
The siphons of this family are very long and are separated, the upper one being half or three-quarters as long as the lower one, and the foot is rather long and pointed, admirably adapted for burrowing.
These latter were the siphons of the clam and if you were to dig under them a little way you would find the beautiful green-rayed shell of a river mussel.
Put the shell into a rock pool, or a basin of water, and you will see the siphons clearly.
The siphons are directed towards the distal end of the foot, so that, e.
It would be another feather in your father's cap,--your father who used to carrysiphons in a basket.
The door was open and Lily, the colored maid, was holding a shrill argument with a man with a basket full of emptysiphons on his arm.
The teredo is long and worm-like in general appearance, with a small bivalve shell at one end and two elongated siphons at the other.
When the tide ebbs the siphonsare closed and partly withdrawn.
The production of this type of apparatus is dependent upon the number of siphons that can be filled by a siphon filler working without interruption.
Manufacturers of plumbing supplies furnish the siphons together with instructions for placing them properly in the concrete walls.
The above caution is necessary, as a bare statement that there is no danger may cause persons to handle the siphons without reasonable care.
The following description has been furnished by the firm: The figure shows one of the siphons connected with a very convenient form of apparatus for preparing a solution of sulphurous acid in water, or of sulphites, as may be required.
The siphons may be obtained either separately or already connected with the absorbing jars.
The siphons are easy to manage, the flow of gaseous acid being regulated with the greatest nicety by simply turning the milled head shown in the engraving, the liquid acid being gradually converted into gas as the pressure is relieved.
It may be mentioned that these siphons contain about two and a half pounds of liquefied sulphurous acid, and can be refilled when required; but those requiring larger quantities can obtain the acid compound in copper drums.
The siphons are short and are united almost to their ends.
The animal has two slender, short, united siphons and a disk-shaped foot with simple margins.
Another gives the two siphonsof /Cardium/, the lower or branchial one being the longer.
The siphons are usually very short, but have wide exterior openings and are also strongly papillate about their margins.
The foot is strong, the animal is active, the siphons are free or partially united, and the gills are more or less crumpled and folded.
The animal has a strong foot and two slender, longsiphons which are yellow in color.
The long siphons may project from the hole and draw in food and breath, but the animal is a prisoner for life.
With such a pointed foot and such short siphons /Cardium/ is obviously not a deep-burrowing genus; but it does partially bury itself in soft semi-liquid sand.
The sewage of the Iles Saint-Louis and de la Cite is carried by two other siphons to the collecteurs of the quais of the right and left banks.
When the sewage in the second chamber reaches a certain height, it siphons out into a tile which distributes it over a plot of ground (Fig.
Various kinds of siphons are used, the important feature of them being that they are constructed so that they drain the tank often enough to remove the oxidized sewage and not so often as to remove it before it has become oxidized.
Thus we have here a receiving and a discharging tube, the exact representatives of the two siphons in such bivalves as Pholas, Venus, etc.
The hue of the former parts is very rich, a fine brilliant orange, with the shaggy fringe of tentacles paler; the siphons are also orange, with the inner surface of the tubes white, having a pearly gleam.
The antiquity of intermittent siphons is of special interest from the fact of their comparatively recent application in sanitary plumbing.
Each of thesiphons in the automaton was intermittent in its action, ceasing to flow when its compartment was emptied, and beginning again spontaneously when the water reached the level of the top of its bend.
The siphons are formed of cast-iron socket pipes, 3.
In some cases these siphons were difficult of access, but ox-teams hauled the pipes in a very efficient and satisfactory manner.
Flacheron supposes that they consisted of small pipes carried from the lowest part of the siphons up along the side of the valley and above the reservoirs, or, in some instances, of taps fixed at the lowest part of the siphons.
There can be no doubt that the inverted siphons were made of lead, although no remains of them have been found; for we know that the Romans used lead largely, and, as we have seen, pieces of the lead distribution pipes have been found.
This was the only instance where siphons were used.
To do this two permanent inverted siphons were built of 48-inch cast-iron pipe.
The use of liquid sulphurous acid in siphons does not offer the same inconveniences.
It lives in, rather than on, muddy beaches, sometimes in crowds of thousands, its shell deeply buried, and its long siphons reaching up to suck in water and food when the tide covers the flat.
Recalling the action of the siphons in the clam, suggest a method by which a squid is propelled through the water.
Drop some powdered chalk or carmine in the water just above the siphon, watch the siphons for several minutes, and note what happens.
Describe the circulation of water through the siphons and mantle cavity of a clam.
In the salt water clam the siphons form a long tube, usually called the "neck.
The main between the Rue St. Fargeau and the Fontaine au Roi, on which there are no collecting reservoirs, but three siphons and eight stop valves, gave, with an average speed of 21 ft.
The presence of the siphons and stop valves did not seem to affect the pressure to any measurable extent.
Corbulidae, 22-28, have short siphons with fringed edges, and the foot protrudes through a hole in the otherwise closed mantle.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "siphons" in a variety of sentences. We hope that you will now be able to make sentences using this word.
