Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Books Books 1 - 10 of 50 on Systematists will have only to decide (not that this will be easy) whether any form....  
" Systematists will have only to decide (not that this will be easy) whether any form be sufficiently constant and distinct from other forms, to be capable of definition; and if definable, whether the differences be sufficiently important to deserve a specific... "
Hope Reports - Page 8
by University of Oxford. Hope Dept. of Zoology - 1906
Full view - About this book

The Transactions of the Entomological Society of London, Volume 51

Entomology - 1904
...sufficiently constant and distinct from other forms to be capable of definition, and if definable, whetJier the differences be sufficiently important to deserve...raise both forms to the rank of species. Hereafter ice shall be compelled to acknowledge that the only distinction between species and well-marked varieties...
Full view - About this book

On the Origin of Species by Means of Natural Selection; Or, The Preservation ...

Charles Darwin - Evolution - 1861 - 440 pages
...sufficiently constant and distinct from other forms, to be capable of definition ; and if definable, whether the differences be sufficiently important to deserve...differences, however slight, between any two forms, if not blinded by intermediate gradations, are looked at by most naturalists as sufficient to raise both forms...
Full view - About this book

On the origin of species by means of natural selection: or, The preservation ...

Charles Darwin - Evolution (Biology) - 1864 - 458 pages
...sufficiently constant and distinct from other forms, to be capable of definition ; and if definable, whether the differences be sufficiently important to deserve...differences, however slight, between any two forms, if not blinded by intermediate gradations, are looked at by most naturalists as sufficient to raise both forms...
Full view - About this book

On the Origin of Species by Means of Natural Selection: Or The Preservation ...

Charles Darwin - Evolution - 1866 - 593 pages
...sufficiently constant and distinct from other forms, to be capable of definition ; and if definable, whether the differences be sufficiently important to deserve...Hereafter we shall be compelled to acknowledge that the only distinction between species and well-marked varieties is, that the latter are known, or believed,...
Full view - About this book

On the origin of species by means of natural selection ; or, The ...

Charles Darwin - Evolution - 1875 - 458 pages
...deserve a specific name. This latter jwint will become a far more essential consideration than it is it present; for differences, however slight, between...Hereafter we shall be compelled to acknowledge that the only distinction between species and well-marked varieties is, that the latter are known, or believed,...
Full view - About this book

Field geology. With a section on palæontology, by A.J. Jukes-Browne

William Henry Penning, Alfred John Jukes- Browne - 1879
...definition ; and, if definable, whether the differences be sufficiently important to deserve a [varietal or] specific name. This latter point will become a far...sufficient to raise both forms to the rank of species.' It must be admitted that a name is required even for varieties when these are definite and constant...
Full view - About this book

The Origin of Species by Means of Natural Selection: Or, The Preservation of ...

Charles Darwin - Evolution - 1882 - 458 pages
...however slight, between any two for^-- if not blended by intermediate gradations, are looked at by mas naturalists as sufficient to raise both forms to the...Hereafter we shall be compelled to acknowledge that the OL; distinction between species and well-marked varieties is, that tilatter are known, or believed,...
Full view - About this book

On the Origin of Species: By Means of Natural Selection, Or, the ...

Charles Darwin - Evolution - 1883 - 458 pages
...sufficiently constant and distinct from other terms, to be capable of definition ; and if definable, whether the differences be sufficiently important to deserve...Hereafter we shall be compelled to acknowledge that the only distinction between species and well-marked varieties is, that the latter are known, or believed,...
Full view - About this book

The Science of Thought

Friedrich Max Müller - Language and languages - 1887 - 664 pages
...could be proved to be due to natural selection and other secondary laws. ' Differences,' he says 2, ' between any two forms, if not blended by intermediate...sufficient to raise both forms to the rank of species.' This, it is true, need not be Darwin's own opinion. But he goes on to say : ' Hereafter we shall be...
Full view - About this book

The science of thought

Friedrich Max Müller - Language and languages - 1887 - 664 pages
...could be proved to be due to natural selection and other secondary laws. ' Differences,' he says 2, ' between any two forms, if not blended by intermediate...sufficient to raise both forms to the rank of species.' This, it is true, need not be Darwin's own opinion. But he goes on to say : ' Hereafter we shall be...
Full view - About this book




  1. My library
  2. Help
  3. Advanced Book Search
  4. Download EPUB
  5. Download PDF