The Origin of Species by Means of Natural Selection: Or the Preservation of Favored Races in the Struggle for Life |
From inside the book
Results 1-5 of 86
Page xviii
... America , ' published in 1836 , wrote ( p . 6 ) as follows : - " All species might have been varieties once , and many va- rieties are gradually becoming species by assuming con- stant and peculiar characters ; " but farther on ( p . 18 ) ...
... America , ' published in 1836 , wrote ( p . 6 ) as follows : - " All species might have been varieties once , and many va- rieties are gradually becoming species by assuming con- stant and peculiar characters ; " but farther on ( p . 18 ) ...
Page 1
... America , and in the geological relations of the present to the past in- habitants of that continent . These facts , as will be seen in the latter chapters of this volume , seemed to throw some light on the origin of species - that mys ...
... America , and in the geological relations of the present to the past in- habitants of that continent . These facts , as will be seen in the latter chapters of this volume , seemed to throw some light on the origin of species - that mys ...
Page 58
... America and Europe , which differ very slightly from each other , have been ranked by one eminent naturalist as undoubted species , and by another as varieties , or , as they are often called geographical races ! Mr. Wallace , in ...
... America and Europe , which differ very slightly from each other , have been ranked by one eminent naturalist as undoubted species , and by another as varieties , or , as they are often called geographical races ! Mr. Wallace , in ...
Page 59
... many naturalists to rank them as distinct species ; but what distance , it has been well asked , will suffice ; if that between America and Europe ? is ample , will that between Europe and the Azores CHAP . II . ] 59 DOUCTFUL SPECIES .
... many naturalists to rank them as distinct species ; but what distance , it has been well asked , will suffice ; if that between America and Europe ? is ample , will that between Europe and the Azores CHAP . II . ] 59 DOUCTFUL SPECIES .
Page 80
... America , and latterly in Australia , had not been well authenticated , they would have been incredible . So it is with plants ; cases could be given of introduced plants which have become common throughout whole islands in a period of ...
... America , and latterly in Australia , had not been well authenticated , they would have been incredible . So it is with plants ; cases could be given of introduced plants which have become common throughout whole islands in a period of ...
Other editions - View all
Common terms and phrases
adapted affinities allied species America ancient appear Asa Gray beak become bees believe belonging birds breeds cause cells characters climate closely allied colour common continent crossed crustaceans degree developed difficulty distinct species domestic doubt effects eggs embryo existing extinct extremely facts favourable fertilised 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 kind lamellę larvę less living males mammals manner marsupials migration modified descendants natural selection naturalists nearly nest occasionally offspring organisation organs parent peculiar perfect pigeon pistil pollen present principle probably produced progenitor quadrupeds ranked remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive supposed swimbladder tend theory tion trees variability variations varieties vary whilst whole wings young