Chapters on EvolutionG. P. Putnam's Sons, 1883 - Всего страниц: 383 |
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Стр. 5
... appendages of lobsters , insects , spiders , and centipedes , be similarly identical in fundamental structure , unless on the theory of their common origin ? Again , from the region of Development , the evolutionist derives a whole host ...
... appendages of lobsters , insects , spiders , and centipedes , be similarly identical in fundamental structure , unless on the theory of their common origin ? Again , from the region of Development , the evolutionist derives a whole host ...
Стр. 40
... a series of some twenty joints , each possessing a pair of appendages modelled , despite their apparent differences , on one and the same plan . So that , although the amalgamated joints of 40 CHAPTERS ON EVOLUTION . IV.
... a series of some twenty joints , each possessing a pair of appendages modelled , despite their apparent differences , on one and the same plan . So that , although the amalgamated joints of 40 CHAPTERS ON EVOLUTION . IV.
Стр. 41
... appendages of the butterfly - body are in pairs , and resemble those of the lobster in all essen- tial particulars , although they are less numerous , m in the adult state at least . So that , beyond and beneath all differences in ...
... appendages of the butterfly - body are in pairs , and resemble those of the lobster in all essen- tial particulars , although they are less numerous , m in the adult state at least . So that , beyond and beneath all differences in ...
Стр. 52
Andrew Wilson. same plan ? Or , again , why should the appendages of the bodies of these animals , which resemble each other far more closely in the early stages than in the adults , present a striking correspondence of type that is only ...
Andrew Wilson. same plan ? Or , again , why should the appendages of the bodies of these animals , which resemble each other far more closely in the early stages than in the adults , present a striking correspondence of type that is only ...
Стр. 53
... appendages being developed in pairs . But when we pass to the lower confines of this group , we discover that the lowest fish ( the lancelet [ or Amphioxus ] , Fig . 13 ) presents us with a clear - bodied organism , attaining a length ...
... appendages being developed in pairs . But when we pass to the lower confines of this group , we discover that the lowest fish ( the lancelet [ or Amphioxus ] , Fig . 13 ) presents us with a clear - bodied organism , attaining a length ...
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adult air-bladder animal or plant animal world animalcule animals and plants appear appendages ascidian Axolotl barnacle become biological bird body bone buds Campodea cells changes chiton cilia colonial common connected constitution crab cross-fertilisation crustaceans curious Darwin degeneration descent discover epoch evolution evolutionist exhibit existence extinct fact favour fertilisation firstly fish flowers formation fossils frog geological germ gills higher animals idea illustrated individual insects jaws lampshells lancelet larva larvæ latter life-history likewise limbs living lobster marsupials ment metamorphosis missing links modification named naturalist nature Nauplius neighbours notochord organisation organs origin pairs period phases pistil pollen pollen-grains possess present primitive primrose produced protoplasm pteropod quadrupeds race regarded remarks represented reptiles resemblance Sacculina scientific sea-squirt seen skull special creation species sponge stage stamens Starfishes structure tail theory tion to-day trace variation vertebrate whilst wings worm young zoophyte