The Origin of Species, Том 2Books, Incorporated, 1900 - Всего страниц: 365 |
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Стр. 395
... larvæ , and these others which finally are developed into mature males and females , propagating their kind in the ... larvæ of this fly having acquired the power of asexual reproduction . As long as the case remained unique , no ...
... larvæ , and these others which finally are developed into mature males and females , propagating their kind in the ... larvæ of this fly having acquired the power of asexual reproduction . As long as the case remained unique , no ...
Стр. 399
... larvæ of the most distinct species in the same class ; the embryo often retaining , while within the egg or womb , struc- tures which are of no service to it , either at that or at a later period of life ; on the other hand , larvæ ...
... larvæ of the most distinct species in the same class ; the embryo often retaining , while within the egg or womb , struc- tures which are of no service to it , either at that or at a later period of life ; on the other hand , larvæ ...
Стр. 403
... larvæ are hatched in the nests of bees ; and when the male bees emerge from their burrows , in the spring , which they do before the females , the larvæ spring on them , and afterward crawl on to the females while paired with the males ...
... larvæ are hatched in the nests of bees ; and when the male bees emerge from their burrows , in the spring , which they do before the females , the larvæ spring on them , and afterward crawl on to the females while paired with the males ...
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adapted admit affinity ancient animals appear Archipelago areas become believe belonging birds Cambrian characters classification climate closely allied species common continent creation crustaceans degree deposits descent with modification developed difficulty distant distinct species domestic doubt embryo Europe existing extinct facts faunas fertility flowers formations formerly forms fossil fresh-water Fritz Müller Gärtner genera genus geological period geological record Glacial period groups of species habits hybrids hybrids produced important INDIANENSIS individuals inhabitants inherited insects instance intermediate intervals land larvæ less living mammæ mammals manner marine Marsupials MDCCCXX migration modified descendants mongrels mountains natural selection naturalists nearly oceanic islands offspring parent peculiar perfect pistil plants pollen present probably produced progenitor quadrupeds reciprocal crosses regions remains remarked reproductive resemblance rocks rudimentary organs seeds SIGILLUM Silurian South America stage stamens sterility structure successive suppose terrestrial tertiary theory of natural tion variations varieties VERITAS whole widely different