On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for Life |
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Page 33
... known . So many strange contingencies are improbable in the highest degree . Byen varvation not due to domestication . Some facts in regard to the colouring of pigeons well deserve consideration . The rock - pigeon is of a slaty- blue ...
... known . So many strange contingencies are improbable in the highest degree . Byen varvation not due to domestication . Some facts in regard to the colouring of pigeons well deserve consideration . The rock - pigeon is of a slaty- blue ...
Page 34
... known principle of reversion to ancestral characters ( confined , as far as I have seen , to colour alone ) , if all the domestic breeds have descended from the rock - pigeon . But if we deny this , we must make one of the two following ...
... known principle of reversion to ancestral characters ( confined , as far as I have seen , to colour alone ) , if all the domestic breeds have descended from the rock - pigeon . But if we deny this , we must make one of the two following ...
Page 35
... known record of pigeons is in the fifth Ægyptian dynasty , about 3000 B.C. , as was pointed out to me by Professor Lepsius ; but Mr. Birch informs me that pigeons are given in a bill of fare in the previous dynasty . In the time of the ...
... known record of pigeons is in the fifth Ægyptian dynasty , about 3000 B.C. , as was pointed out to me by Professor Lepsius ; but Mr. Birch informs me that pigeons are given in a bill of fare in the previous dynasty . In the time of the ...
Page 37
... known to have been the case with the ancon sheep . But when we compare the dray - horse and race - horse , the dromedary and camel , the various breeds of sheep fitted either for cultivated land or mountain pasture , with the wool of ...
... known to have been the case with the ancon sheep . But when we compare the dray - horse and race - horse , the dromedary and camel , the various breeds of sheep fitted either for cultivated land or mountain pasture , with the wool of ...
Page 41
... known that the English pointer has been greatly changed within the last century , and in this case the change has , it is believed , been chiefly effected by crosses with the fox - hound ; but what concerns us is , that the change has ...
... known that the English pointer has been greatly changed within the last century , and in this case the change has , it is believed , been chiefly effected by crosses with the fox - hound ; but what concerns us is , that the change has ...
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Common terms and phrases
accumulated adapted affinities allied species America analogous ancient animals appear archipelago become bees believe birds breeds cause cells characters cirripedes climate closely allied colour continuous crossed crustaceans degree difficulty distinct species divergence domestic doubt embryo endemic existing exterminated extinct extremely facts favourable fertilised fertility flowers formations forms fossil Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hybrids hybrids produced important increase individuals inhabitants inherited insects instance instincts intercrossing intermediate larvæ laws less living males mammals manner migration modification modified descendants natural selection naturalists nearly nest occasionally offspring organic organisation origin of species perfect pigeons plants pollen present principle probably produced progenitor ranked reciprocal crosses remarked resemble rock-pigeon rudimentary seeds sexual sexual selection Silurian slight sometimes South America sterility structure struggle successive supposed swimbladder tend theory variability variations varieties vary whole widely