Lectures on the Darwinian Theory Delivered by the Late Arthur Milnes MarshallMacmillan, 1894 - 236 síður |
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actual adult condition afforded Amphibia Amphioxus ancestors ancestral history animals and plants antennules antlers appearance artificial selection Ascidians become birds body bones butterflies camels caterpillar causes cells characteristic characters Crab Cuvier Darwin degenerate deposits descended distinct early stages earth eggs embryo embryology evidence example explanation extinct fact feathers fertilised Fissurella flat fish flowers food-yolk forms fossils frog geological gill-breathing gill-cleft gills gradually groups of animals habits Haliotis hatching higher animals horse Hylodes insects instance intermediate known Lamarck large number larva larvæ lecture limbs Linnæus living mammals Metazoa Miocene modification moth mouth Natural Selection Nauplius notochord organs origin Origin of Species pairs Palæontology pigeons Pliocene pollen masses pollinia present preserved protective colouring pupa Recapitulation Theory regard reptiles resemblance rudimentary Sacculina seen shell side skin species structure survive swimming Tadpole tail tion variations Vertebrates Wallace warning colours wings young
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Síða 200 - In the distant future I see open fields for far more important researches. Psychology will be based on a new foundation, that of the necessary acquirement of each mental power and capacity by gradation. Light will be thrown on the origin of man and his history.
Síða 196 - I happened to read for amusement ' Malthus on Population,' and being well prepared to appreciate the struggle for existence which everywhere goes on from long-continued observation of the habits of animals and plants, it at once struck me that under these circumstances favourable variations would tend to be preserved, and unfavourable ones to be destroyed. The result of this would be the formation of new species. Here then I had at last got a theory by which to work...
Síða 210 - I had, also, during many years followed a golden rule, namely, that whenever a published fact, a new observation or thought came across me, which was opposed to my general results, to make a memorandum of it without fail and at once; for I had found by 69 experience that such facts and thoughts were far more apt to escape from the memory than favourable ones.
Síða 163 - The death of a man at a critical juncture, his disgust, his retreat, his disgrace, have brought innumerable calamities on a whole nation. A common soldier, a child, a girl at the door of an inn, have changed the face of fortune, and almost of Nature.
Síða 209 - From my early youth I have had the strongest desire to understand or explain whatever I observed, — that is, to group all facts under some general laws.
Síða 194 - In July opened first note-book on Transmutation of Species. Had been greatly struck from about the month of previous March on character of South American fossils, and species on Galapagos Archipelago. These facts (especially latter), origin of all my views...
Síða 205 - I was idling and resting near Hartfield, where two species of Drosera abound; and I noticed that numerous insects had been entrapped by the leaves. I carried home some plants, and on giving them insects saw the movements of the tentacles, and this made me think it probable that the insects were caught for some special purpose. Fortunately a crucial test occurred to me, that of placing a large number of leaves in various nitrogenous and non-nitrogenous fluids of equal density; and as soon as I found...
Síða 70 - I look at the geological record as a history of the world imperfectly kept, and written in a changing dialect ; of this history we possess the last volume alone, relating only to two or three countries. Ot this volume, only here and there a short chapter has been preserved ; and of each page, only here and there a few lines.
Síða 38 - There is no exception to the rule that every organic being naturally increases at so high a rate that, if not destroyed, the earth would soon be covered by the progeny of a single pair.
Síða 188 - Nothing could have been worse for the development of my mind than Dr. Butler's school, as it was strictly classical, nothing else being taught, except a little ancient geography and history. The school as a means of education to me was simply a blank.