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 10
... Glacial period co - extensive with the world .. 300 CHAPTER XII GEOGRAPHICAL DISTRIBUTION - continued Distribution of fresh - water productions - On the inhabitants of oceanic islands - Absence of Batrachians and of terrestrial Mam ...
... Glacial period co - extensive with the world .. 300 CHAPTER XII GEOGRAPHICAL DISTRIBUTION - continued Distribution of fresh - water productions - On the inhabitants of oceanic islands - Absence of Batrachians and of terrestrial Mam ...
Page 121
... glacial period would have been an incomparably stronger case , for these have been exposed to great changes of climate and have migrated over great distances ; whereas , in Egypt , during the last 3,000 years , the conditions of life ...
... glacial period would have been an incomparably stronger case , for these have been exposed to great changes of climate and have migrated over great distances ; whereas , in Egypt , during the last 3,000 years , the conditions of life ...
Page 257
... glacial period which forms only a part of one whole geological period ; and likewise to reflect on the great changes of level , on the inordinately great change of climate , on the prodigious lapse of time , all included within this same ...
... glacial period which forms only a part of one whole geological period ; and likewise to reflect on the great changes of level , on the inordinately great change of climate , on the prodigious lapse of time , all included within this same ...
Page 281
... periods , would still be manifest , and the several formations could be easily correlated . These observations , however ... period as measured by years , including the whole glacial epoch ) , were to be compared with those now living in ...
... periods , would still be manifest , and the several formations could be easily correlated . These observations , however ... period as measured by years , including the whole glacial epoch ) , were to be compared with those now living in ...
Page 290
... stage . This fact alone , from its generality , seems to have shaken Professor Pictet in his firm belief in the ... glacial period , and note how little the specific forms of the inhabitants of the sea have been affected . On the ...
... stage . This fact alone , from its generality , seems to have shaken Professor Pictet in his firm belief in the ... glacial period , and note how little the specific forms of the inhabitants of the sea have been affected . On the ...
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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