They are perfectly arranged to crush the shells of the molluscs, as well as the resisting envelope of the crustaceanson which they feed.
It feeds upon crustaceans and small fishes, which it drags from the interstices of the rocks and stones by means of its long and taper pipe.
It is now known, however, that these are the young of the higher forms of Crustaceans undergoing metamorphosis.
As soon as born, the young Crustaceans withdraw from the mother and ascend to the surface of the water, in order to gain the open sea.
We have said that the Crustaceans do not even respect each other; the larger of the same species often devour the smaller.
These efforts continue in full vigour for two or three days, and I have succeeded sometimes in feeding them with the small crustaceans which swarm on our coasts.
Crustaceans are nearly all carnivorous, and eat eagerly all other animals, whether living or dead, fresh or decomposed.
This, probably, arises from its exposure to the attacks of crustaceans and other marine carnivora.
The Crustaceans have nearly all of them claws, formidably hooked and toothed, which they employ as pincers, both in offensive and defensive war.
This is the reason for the many Crustaceans met with having the talons of very unequal size: the smaller are those lost in battle replaced.
Several small animals, crustaceans and mollusks, gathered in the river and picked up in the sementeras by the women, are cooked and eaten.
On land it feeds upon water-weeds, frogs, and grain, and at sea upon crustaceans and molluscs.
It runs with the utmost grace and ease, picking up tiny crustaceans as it goes.
On our coasts these ducks feed upon crustaceans and molluscs, and many fishermen know it by the name of "mussel-cracker.
The diet of cod changes from small crustaceans in shallow water to progressively larger food that eventually includes herring, sand lance, shrimp, and crabs.
There are, unfortunately, no data on the digestibility of marine invertebrates, but those for insects suggest that digestibility, at least of crustaceans with exoskeletons, is somewhat lower than that for fish.
Offal from wounded whales and seals, and bits of food, primarily crustaceans and fish, from feeding whales are important scavenger foods (Bent 1922).
Small Annelids and Crustaceans not unfrequently burrow into the stony walls of corals; but Dr Gray records a much more uncommon case, from the Guilding collection.
It is well known that Crustaceans of the genus Pagurus inhabit the empty shells of Mollusca; but we find on the shore the same species of Pagurus in the shells of the most various genera and species.
What of the bladderwort, in whose inflated traps tiny crustaceans are imprisoned, or the pitcher plant, that makes soup of its guests?
Crustaceans of a very strange form, and in no respects resembling the Trilobites, have been met with in the Silurian rocks of England and America--the Pterygotus (Fig.
Finally, theCrustaceans include the genera Pagurus (or the Hermit crabs); Astacus.
Many of these Crustaceans could roll themselves into balls, like the wood-louse (Figs.
Crustaceans are rare in the Carboniferous Limestone strata; the genus Phillipsia is the last of the Trilobites, all of which became extinct at the close of this period.
The seas of this epoch included an immense number of Zoophytes, nearly 400 species of Mollusca, and a few Crustaceans and Fishes.
Among Crustaceans the Trilobites are still somewhat numerous, especially in the middle rocks of the period.
But in almost all the higher crustaceans a change takes place before it leaves the egg, and it appears at last in the form of a zoea.
CRABS First among the crustaceanscome the crabs, of which there are a great many different kinds.
These minute crustaceans exist in vast multitudes near the surface of the ocean at certain seasons, and form the principal food of the whalebone-whales, which gulp them down wholesale.
And--once more like the insects--crustaceans have to pass through several different forms before they reach the perfect state.
The probings are for the minute sand fleas and other crustaceans in the sand, their principal food.
These birds appear to be feeding on small crustaceans and worms on the beaches and on insects and their larvae in the marshes.
One of the best-known groups of crustaceans is represented by those with ten feet, of which the common lobster (Fig.
In the summer, while strolling alongshore, one may find that every piece of seaweed or rock when turned over affords concealment to myriads of "sand fleas" which belong to a group of crustaceans having fourteen feet.
Many of the crustaceans are so small that but few persons ever see them.
The crustaceans deposit eggs which they carry about with them attached to the swimmerets, and resembling minute bunches of grapes.
They are crustaceanswhich are attached to the bottom by their antennæ.
Some of these minute crustaceans are almost exact in their resemblance to shells, as Estheria which has a bivalve shell.
Some idea of the various internal organs of the crustaceans may be obtained in Figure 131.
The crustaceans are found in all waters, fresh and salt, and on land.
The crustaceans may almost be called the insects of the ocean, as in general appearance they closely resemble these animals; but the real insects are higher forms.
One of the most interesting of these ten-footed crustaceans is the blind crayfish of Mammoth Cave.
We did some dredging here on a smooth sandy bottom, the principal results of which were specimens of the Chimaera (Callorhynchus australis), and some curious Isopod Crustaceans of the genus Serolis.
Crustaceans of the genera Myra, Hiastemis, Lambrus, Alpheus, Huenia, and many others.
We made several hauls of the dredge in four to five fathoms of water, obtaining a quantity of large Starfishes and Gorgonias, and Crustaceans of the family Porcellanidae.
It was encrusted with a delicate white Polyzoon (Membranipora), and among other organisms carried on its fronds a pretty little Spirorbis shell, and several entomostracous Crustaceans of a deep-blue colour.
Among the Crustaceans obtained in the above dredgings was a species of Glaucothoee new to science, which has since been described by Mr. E.
It feeds upon crustaceans and small Fishes, which it drags from the interstices of the rocks and stones by means of its long pipe.
They swim open-mouthed, often with their snouts at the surface, crossing and recrossing on their tracks, and evidently straining out the minute crustaceans by means of their branchial sieves.
Among them are the shrimp and prawn, thin-shelled, active crustaceans common along our eastern coast.
Several other commoncrustaceans are near relatives of the crayfish.
The trilobites, crustaceans somewhat resembling our horseshoe crab, were the lords of the Cambrian seas and marked the point to which organic evolution had then attained.
By means of millions of stinging cells on its four frilled lips and on its marginal tentacles it is able to paralyse and lasso minute crustaceans and the like, which it then wafts into its mouth.
Thus the African mudfish may spend half the year encased in the mud, and many minute crustaceans can survive being dried up for years.
They were jointed-footed animals, allied to Crustaceans and perhaps also to King-crabs.
Fishes, frogs, snails, insects, and crustaceans are alike devoured by them.
They also carry the spawn of fishes and small crustaceans among their feathers into new waters, and feed upon the countless seeds of weeds that are scattered broadcast over the face of the earth.
In female crustaceans the roe is placed outside the shell to which it adheres.
Small crustaceans were plentiful on the surface, but they were if anything more numerous at depths of fifty to one hundred fathoms.
Besides rocks and mud there were abundant crinoids, holothurians, corals, crustaceans and "shells.
Hodgeman made several varieties of bag-traps which were lowered over the edge of the harbour-ice, and many large "worms" and crustaceans were caught and preserved.
A beautiful little bird seen hovering in flocks over the Southern Ocean, in search of the small crustaceanswhich constitute their food.
A fish of the northern seas, from 2 to 3 feet long, with formidable teeth, with which it crushes the shells of the crustaceans and mollusks on which it feeds.
The males of certain moths and of some crustaceans (e.
The chelae of many crustaceans are weapons well adapted for fighting.
Unfortunately the habits of crustaceans are very imperfectly known, and we cannot explain the uses of many structures peculiar to one sex.
Spence Bate, tell me that the males of spiders and crustaceans are more active and more erratic in their habits than the females.
Many female parasiticcrustaceans have lost their natatory legs.
We have evidence of this capacity even low down in the animal scale: thus Crustaceans are provided with auditory hairs of different lengths, which have been seen to vibrate when the proper musical notes are struck.
Some of the lower Crustaceans are able to propagate their kind sexually, and this will account for the extreme rarity of the males; thus von Siebold (93.
Bert's observations on Daphnia, when placed in a vessel illuminated by a prism, we have reason to believe that even the lowest crustaceans can distinguish colours.
Footnote 1: Kirby says that it is "in pursuit of certain crustaceans that form its food" (Bridgewater Treatise, vol i.
I am not aware of any crustaceans in the island which ascend the palmyra or feed upon its fruit.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "crustaceans" in a variety of sentences. We hope that you will now be able to make sentences using this word.
