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Thus these animals, which the naked eye has not power to discern, have themselves the power to build up mountain chains. . . Invitation to Professorships at Geneva and Lausanne. Death of his Father. Establishment of Lithographic Press at Neuchatel. Researches upon Structure of Mollusks. Internal Casts of Shells. Glacial Explorations. Views of Buckland. Relations with Arnold Guyot.
Their progress became ever slower. They were entirely and hopelessly beaten by the vertebrates. They struggled hard, but too late. The history of mollusks is full of interest. They show clearly how intimately nervous development is connected with the use of the locomotive organs. The snail crept, and slightly increased its nervous system and sense-organs.
Of their fruits and mollusks they were getting tired, and their stomachs began to revolt at such food. They eyed, the professor especially, the sheep, agouties, and fowls which went and came round Will Tree. The pangs of hunger seized them as they gazed. With their eyes they ate the living meat! No! It could not go on like this!
"Deadly, my dear Bunny, is not the word for that glorified snag, or for the mollusks, its inhabitants. But they started by wounding my vanity, so perhaps I am prejudiced, after all. I sprung myself upon them as a shipwrecked sailor a sole survivor stripped in the sea and landed without a stitch yet they took no more interest in me than you do in Italian organ-grinders. They were decent enough.
When we look at the animal kingdom, we recognize there also the presence of simple, all-pervading laws. The four great types of animal structures are readily discerned by the dullest eye: no man fails to see the likeness among all vertebrates, or the likeness among all articulates, the likeness among alt mollusks, or the likeness among all radiates.
This creature lives on the bottom, his food being chiefly mollusks and crustaceae, for the disposal of which he has a huge mouth with a pavement of flat enameled teeth. He lies usually half buried in the sand, and is much dreaded by the fishermen, who are in danger of treading on him as they wade to cast their nets.
But now they began to rally, waking up and stretching themselves and yawning, the last two actions appearing to be the leading operations of a rowdy's toilet; and, gathering round Lobster Bob, who has been steadily employed in opening oysters for all who have a midsummer faith in those mollusks, they commenced rapidly swallowing great quantities of the various kinds, which they seasoned to an alarming extent with coarse black pepper and brownish salt.
The trilobites are gone, and of the crinoids only a remnant is left. Most of the corals of the earlier days have disappeared, but the mollusks have not changed more than they did at several different times in the earliest stages of the earth's history.
It is all very fine to recognise in the ascending series of protozoa, cœlenterata, echinoderms, worms, mollusks, fishes, amphibia, reptiles, the stages of progress toward birds and finally to mammals and man. But whence comes the idea of bird or pigeon?
We may mention in passing that Fleischmann examines the "roots of the mammal stock," and enters upon a detailed discussion of "the origin of lung-breathing vertebrates," the "real phylo-genetic problem of the mollusks," and "the origin of the echinodermata."
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