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Updated: June 29, 2025
The crustacean, less perfectly worked out than the insect assuredly, but more regular, forms, so to speak, the connecting line between that tiny masterpiece of fancy, so incomplete in its exquisite organisation, and the shapeless but better constituted lump of the mollusk, who conceals under his heavy shell the sacred deposit of real organs, those which we expect to find always and everywhere.
For instance, it cannot be doubted that all the Cambrian and Silurian trilobites are descended from some one crustacean, which must have lived long before the Cambrian age, and which probably differed greatly from any known animal.
The pocket had given way at last under its overpowering burden, and now appeared ignominiously upborne on the claws of its former prisoner. The Modoc seized the crustacean with glittering defiance in her eyes, and at recess, I saw that turbaned Amazon devouring it, with a group of wistful and admiring faces gathered round. The boys were out in the bay "setting pots" and "trolling for bait."
If digestion were a thing to be trifled with, I might sup upon lobster, and the matter of life of the crustacean would undergo the same wonderful metamorphosis into humanity. And were I to return to my own place by sea, and undergo shipwreck, the crustacea might, and probably would, return the compliment, and demonstrate our common nature by turning my protoplasm into living lobster.
If we go still further back in time, we discover, in the oldest rocks of all, the remains of animals, constructed on the same general plan as the lobster, and belonging to the same great group of 'Crustacea'; but for the most part totally different from the lobster, and indeed from any other living form of crustacean; and thus we gain a notion of that successive change of the animal population of the globe, in past ages, which is the most striking fact revealed by geology.
There is a little crustacean which, coming naked into the world, chooses an empty shell and adapts itself thereto; when it grows larger and the shell becomes too tight, it sallies forth and takes up its abode in a larger one. This the creature does of its own accord, without a savant to measure it or a teacher to choose a new shell for it.
The crustacean found in the pits of mines, which is related to the sand flea, shows, according to Dr. R. Schneider, a slight degeneration of the organ of sight, which has taken place in consequence of its adaptation to the dark places, in which this variety of the Gammarus pulex is found, which can make no use of eyes, while the sand flea possesses them fully developed.
As a matter of course Mantovani became his chief preceptor Mantovani who first discovered that the highly complex organism we call a work of art has a morphology as definite as that of a trilobite; that the artist may no more transcend his own forms than a crustacean may become a vertebrate.
Its habitat is especially in low-lying spots near the shore, where water may be found at a trifling depth beneath the soil. To establish its dwelling, the Crustacean first buries itself until it reaches the liquid level. Arrived at this point, it makes a large lair in the soft soil, and effects communication with the outside by various openings.
Professor Owen had, at first, scarcely any hesitation in pronouncing the footprints to be those of tortoises; but he afterwards changed his views, and expressed his belief that the impressions had been produced by small crustacean animals.
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