These graceful molluscs moved backwards by means of their locomotive tube, through which they propelled the water already drawn in.
To the fine sand succeeded a perfect causeway of boulders, covered with a carpet of molluscs and zoophytes.
These boring molluscs do great damage to wharves and ships.
The molluscs are not to be mistaken for any other of the lower animals; they have a structure peculiarly their own.
Some of the special characteristics of structure, life-history, and habits of the molluscs will be noted in our consideration of the various kinds.
The shells of molluscs can be preserved dry, of course, in drawers or boxes divided into small compartments.
This highly developed condition of the circulatory system also distinguishes the molluscs from the other invertebrates.
In the case of some of the molluscs without external shell there are inside the body the rudiments or vestiges of a shell.
Molluscs live on land, in fresh water and in the ocean.
But most of the molluscs are shell-bearing animals.
Nautilus constituting the class Cephalopoda are very different from the other molluscs in appearance, and are in fact different in important structural characters.
But in most of the other molluscs one or more of these four body-regions are so fused with some other region as to be indistinguishable.
These fresh-water and land-molluscs which possess a lung-sac instead of gills constitute the order Pulmonata.
Perhaps one-half of all the known species of molluscs are snails and slugs (fig.
The Silurian Lingula differs but little from the living species of this genus; whereas most of the other Silurian Molluscs and all the Crustaceans have changed greatly.
The shelled molluscs differ from all other animals, in that the shell is a secretion, almost as distinct from the animals as a house is from its occupant.
The naked molluscsare often most exquisitely coloured, and the feathery gills that adorn many are suffused with some of the most brilliant colours in nature.
Boy was very pleased indeed with this song, which the First Class in Molluscssang very well, and clapped vigorously.
Would you like to join them while I give the First Class in Molluscs their singing lesson?
It is therefore probable that, in the species of Murex, the purple gland is a poison-gland serving for defence, or for the capture of the prey upon which these molluscs feed.
Poseidon (Neptune), his trumpet being a wreathed univalve shell: a genus ofmolluscs with a wreathed univalve shell.
This is proved in the case of the scoters, which are both specialized and rather restricted to nearshore beds of molluscs and have fallen victim to local oil slicks (Smail et al.
Kupelwieser[62] observed that the spermatozoon ofmolluscs may occasionally enter into the egg of S.
The writer has vainly looked for it in different forms of the Californian starfish or molluscs and in fish at Woods Hole.
Human intelligence is certainly a product, and a late and highly organised product, of evolution; it ought apparently to be as much admired as the eyes of molluscs or the antennae of ants.
Strictly speaking, we cannot so compare them; but they have considerable resemblance to the less determinate circulation which materialists have lately discovered in some inferior creatures, as molluscs and annelides.
The Medusae and the Molluscs are generally innocent creatures, and I have thus far dwelt, as it were, with them in their amiable and peaceful world.
From the molluscs even up to man, every being in this next world is to be made up of two corresponding halves; in every animal is to be found (far better than unity) Union.
The rayed family and the molluscs exhibit a presentiment, a partial sketch of it, but they were too much led away by the insoluble problem of the exterior defence.
In Molluscsthe sack-shaped and non-articulate body is the distinguishing feature.
In particular, it was obvious that innumerable molluscs of the smaller, and therefore less-known species, found shelter and food among the seaweeds that densely clothed the rocks.
You put your seaweeds in a basin of cold fresh water, and all the molluscs instantly let go and fall to the bottom.
These molluscs seemed brought to my hand that I might look at them.
Certainly he who has watched the little molluscs at their love and their play will be slow to think that they have not a sense of beauty which can be pleased.
The three groups of vertebrated animals, articulated animals, and molluscs are so much in accordance with nature that they are retained, even at the present day, little altered in extent.
Molluscs which I have given in my General Morphology, and I shall now at once turn to the consideration of the tribe of Star-fishes.
The anatomical difference between the Lamp-shells and the three other classes of Molluscs is so considerable that the latter may be distinguished from the former by the name of Otocardia.
Hence the four classes of Molluscs may be grouped in the following manner:-- { 1.
The still living Molluscs and Worms must be considered as only a proportionately small remnant of the vast molluscan fauna, which greatly predominated in the primordial and primary periods over the other tribes.
In geology the different species of the fossil shells of Molluscs are of the greatest importance because they serve as excellent marks whereby to characterize the different groups of strata, and to fix their relative ages.
We may consider the tribe of Molluscs as the most imperfect and the lowest in point of morphological development.
Among the latter are the Land-snails, the only Molluscs which have left the water and become habituated to a life on land.
The result of these structural dispositions for the history of the pedigree of Molluscs, which is confirmed by palaeontology, is that Lamp-shells stand much nearer to the primaeval root of the whole tribe of Molluscs than do the Otocardia.
If, then, we have a case of chemical boring in these worms, is it not probable that many Molluscs are similarly assisted in their excavations?
In the former they present molluscs and other marine organisms of known Devonian species; in the latter they afford remains of fishes, some of which are specifically identical with those of the Old Red Sandstone of Scotland.
The pelecypod molluscs were represented by Pterinea, abundant in the lower members along with other large-winged forms, and by Cucullella, Buchiola and Curtonotus in the upper members of the system.
The fact that the eyes of insects and molluscsare transparent to us shows that the very same limited portion of the rays of the spectrum is utilised for vision by them as by us.
The only other molluscs in which they are exactly represented are the curious Opisthobranchs Phyllidia and Pleurophyllidia (fig.
Their departure or expulsion from all the parent molluscs of the oyster-bank or bed takes place at the same time.
The oyster is a genus of lamellibranchiatemolluscs of the section with a single adductor muscle.
Frogs, tadpoles, and molluscs such as snails are also consumed.
They will also perch on rank grasses and water plants and eat small molluscs (Bent 1953).
It is impossible to speak of insects or molluscs without naming these animalcules, which seem to be their rough outline, and in the extreme simplicity of their organism already foretoken, indicate, and prepare for them.
The adductor muscles of bivalve molluscs and crustaceans are, he shows plainly, the necessary consequence of the bivalvular condition.
The elimination of the barnacles or Cirrhipedes from the molluscs was a decided step in advance, and was a proof of the acute observation and sound judgment of Lamarck.
Lamarck") he had retained that of Mollusca, and yet it was in the special classification of the molluscs that Lamarck did his best work (Blainville, l.
Referring to the earlier volume, he states that "it has extended immensely the knowledge, especially by a new distribution, of the shelled molluscs .
In his paper on the hinge of Pelecypod molluscs and its development, he has pointed out a number of the particular ways in which the dynamics of the environment may act on the characters of the hinge and shell of bivalve molluscs.
He agrees with Cuvier in placing the molluscsat the head of the invertebrates, a course still pursued by some zoölogists at the present day.
In the acephalous molluscs, the great development of the mantle of these molluscs has rendered their eyes and even their head entirely useless.
These molluscs were of excellent quality, and the colonists consumed some daily.
They are not mussels," replied Herbert, who was attentively examining the molluscs attached to the rocks; "they are lithodomes.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "molluscs" in a variety of sentences. We hope that you will now be able to make sentences using this word.
