The American Naturalist, Svazek 27Essex Institute, 1893 |
Obsah
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abundant algæ American Ancylopoda animals appear Bayou beds birds body bones Botanical Brachiopoda Bull cells Chalicotherium characters collected color Cope Cretaceous dentition deposits described discovery dorsal entirely Eocene evidence Extr fact fauna feet fish formation forms fossil gastrulation genera genus Geol Geological glacial gray hemipenis inches incisors insects keel known laboratory Lake larva larvæ later layer length Lepidosiren lower Meniscotherium metapodial mineral Miocene molars mound Museum Natural NATURALIST North observed Orange Mound Oreodon organs origin Paleozoic paper papillæ parasite Perissodactyla phalanges plants plate portion posterior premolars present Prof Professor recent region relation Rhizobia River rocks schists Science segment shell heaps side skull Society species specimens stage structure surface teeth tion Titanotherium tubercles ungulate Unio upper whorl Zoology
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Strana 597 - ... show reversional tendencies due to old age; so that nearly every stage passed through by the higher genera has a fixed representative in a lower genus. Moreover, the lower genera are not merely equivalent to or in exact parallelism with the early stages of the higher, but they express a permanent type of structure, as far as these genera are concerned, and after reaching maturity do not show a tendency to attain higher phases of development, but thicken the shell and cardinal process, absorb...
Strana 927 - The anthropoid apes no doubt approach nearer to man in bodily structure than do any other animals, but, when we consider the habits of ants, their large communities and elaborate habitations, their roadways, their possession of domestic animals, and, even in some cases, of slaves, it must be admitted that they have a fair claim to rank next to man in the scale of intelligence.
Strana 1 - I had that expectation, when I first put a sprig of mint into "a glass jar, standing inverted in a vessel of water: but when "it had continued growing there for some months, I found "that the air would neither extinguish a candle, nor was it "at all inconvenient to a mouse which I put into it.
Strana 647 - HOW TO KNOW THE WILD FLOWERS. A Guide to the Names, Haunts, and Habits of our Common Wild Flowers. By Mrs. WILLIAM STARR DANA.
Strana 747 - Those which have fed sufficiently are at once replaced by hungry new-comers, and the destruction of the foliage goes on Incessantly. At such times the trunks and lower branches of trees are covered with a moving mass of caterpillars, hurrying throngs are passing and repassing, and nearly every leaf or denuded stem bears up one or more of the feeding insects. The rustling caused by their movements and the continual dropping of excrements Is plainly audible. On tall trees the larger caterpillars appear...
Strana 590 - July 6, for regular courses of seven weeks in zoology, botany, and microscopical technique. The number admitted to this department will be limited to fifty, and preference will be given to teachers and others already qualified. By permission of the director, students may begin their individual work as early as June 15 without extra charge, but the regular courses of instruction will not begin before July 6.
Strana 1 - I have been so happy as by accident to hit upon a method of restoring air which has been injured by the burning of candles and to have discovered at least one of the restoratives which Nature employs for this purpose. It is vegetation.
Strana 527 - ... including under this term several geographical races or sub-species, which differ from each other in the most trifling respects. As several of the reasons which have led me to this belief are in some degree applicable in other cases, I will here briefly give them.