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animals appear arteries attached become belong birds blood body bones brain branches called canal cavity cells changes circulation classes close common complete composed consists contains cord covered distinct distributed divided embryo example exist external extremity fauna fibres fishes fluid formation four glands head heart Ibid important insects internal intestine jaws lateral layer less liver living lower lungs magnified mammals means membrane middle mollusca motions mouth muscles muscular namely natural nerves nervous observed organs pair pass period plants portion posterior present primary produced regions remains represented reptiles respiration round secreting seen separate shell side similar simple single species spinal stomach structure substance surface surrounded terminal tion tissue tube upper various vegetable vertebral vessels whole yolk young
Page 417 - that there is a manifest progress in the succession of beings on the surface of the earth. This progress consists in an increasing similarity to the living fauna, and among the vertebrates, especially in their increasing resemblance to man.
Page 418 - The link by which they are connected is of a higher and immaterial nature ; and their connection is to be sought in the view of the Creator himself, whose aim, in forming the earth, in allowing it to undergo the successive changes which Geology has pointed out, and in creating successively all the different types of animals which have passed away, was to introduce Man upon the surface of our globe. Man is the end towards which all the animal creation has tended, from the first appearance of the first...
Page 388 - There will be no scientific evidence of God's working in nature until naturalists have shown that the whole Creation is the expression of a thought, and not the product of physical agents.
Page 417 - But this connection is not the consequence of a direct lineage between the faunas of different ages. There is nothing like parental descent connecting them. The fishes of the Palaeozoic age are in no respect the ancestors of the reptiles of the Secondary age, nor does man descend from the mammals which preceded him in the Tertiary age. The link by which they are connected is of a higher and immaterial nature ; and their connection is to be sought in the view of the Creator Himself...
Page 345 - ... nurse and take care of it. It is no longer the body of the nurse, but its own instincts, which become the instrument of the development. This seems to receive confirmation from the fact that the working bees, like the plant-lice, are barren females. The attributes of their sex, in both, seem to consist only in their solicitude for the welfare of the new generation, of which they are the natural guardians, but not the parents.
Page 365 - The depths of the ocean are quite as impassable for marine species as high mountains are for terrestrial animals. It would be quite as difficult for a fish or a mollusk to cross from the coast of Europe to the coast of America, as it would be for a reindeer to pass from the arctic to the antarctic regions, across the torrid zone. Experiments of dredging in very deep water have also taught us that the abyss of the ocean is nearly a desert.
Page 3 - There are collections of marine shells, bivalve and univalve, which amount to 5 or 6000 ; and collections of land and fluviatile shells, which count as many as 2000. The total number of mollusks would, therefore, probably exceed 1 ^0 species.
Page 359 - Sturgeon ; its mouth, also, is transverse and inferior, and its tail undivided ; at that period the White-fish and the Sturgeon are, therefore, much more alike. But this similarity is only transient ; as the White-fish grows, its vertebrae become ossified, and its resemblance to the Sturgeon is comparatively slight. As the Sturgeon has no such transformation of the vertebrae, and is, in some sense, arrested in its development, while the White-fish undergoes subsequent transformation, we conclude...