The Origin of Species by Means of Natural Selection, Or, The Preservation of Favored Races in the Struggle for Life: Reprinted from the Sixth London Edition, with All Additions and CorrectionsA. L. Burt Company, 1890 - 538페이지 |
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257 페이지
... pupae to rear as slaves . I then dug up a small parcel of the pupa of F. fusca from another nest , and put them down on a bare spot near the place of combat ; they were eagerly seized and carried off by the tyrants , who perhaps fancied ...
... pupae to rear as slaves . I then dug up a small parcel of the pupa of F. fusca from another nest , and put them down on a bare spot near the place of combat ; they were eagerly seized and carried off by the tyrants , who perhaps fancied ...
258 페이지
... pupa of F. fusca , whereas they were much terrified when they came across the pupæ , or even the earth from the nest , of F. flava , and quickly ran away ; but in about a quarter of an hour , shortly after all the little yellow ants had ...
... pupa of F. fusca , whereas they were much terrified when they came across the pupæ , or even the earth from the nest , of F. flava , and quickly ran away ; but in about a quarter of an hour , shortly after all the little yellow ants had ...
509 페이지
... ( pupa ) of their existence . The term " cocoon - stage " is here used as equivalent to " pupa - stage . " " " COELOSPERMOUS . - A term applied to those fruits of the Umbelliferæ which have the seed hollowed on the inner face . COLEOPTERA ...
... ( pupa ) of their existence . The term " cocoon - stage " is here used as equivalent to " pupa - stage . " " " COELOSPERMOUS . - A term applied to those fruits of the Umbelliferæ which have the seed hollowed on the inner face . COLEOPTERA ...
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adapted admit affinities ALEXANDRE DUMAS allied species America ancient appear beak become bees believe belonging birds breeds cause cells characters climate closely allied color continued crossed crustaceans degree developed difficulty distinct species domestic doubt effects eggs embryo existing extinct extremely facts favorable females fertility flowers formation forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate intervals kind lamellæ larvæ less living male mammals manner marsupials migration modified descendants natural selection naturalists nearly nest oceanic islands offspring organs paleozoic parent peculiar perfect pigeons pistil pollen present principle probably produced quadrupeds ranked remarked resemblance rudimentary seeds Silurian SIR WALTER SCOTT slight South America stamens sterility structure successive suppose tend theory tion trees variability variations varieties vary whole widely different wings young