| → in the case of 1859 1860 1861 1866 1869 |
| with 1872 |
|
| → effected by palæontologists. 1859 1860 1861 1866 1869 |
| done. 1872 |
|
| → OMIT 1860 1861 1866 1869 1872 |
| CHAP. IX. GEOLOGICAL RECORD. 1859 |
|
| → only 1859 1860 1861 1869 1872 |
| distinct species from their European representatives, and by other conchologists as only 1866 |
|
| → only by the future geologist 1859 1860 1861 1866 1869 |
| by the future geologist only by his 1872 |
|
| → is 1861 1866 1869 1872 |
| seems to me 1859 1860 |
|
| → is entirely 1861 1866 1869 |
| as we shall see in the next chapter, is certainly 1872 |
|
| → forms." We clearly see this if 1866 1869 |
| forms." We clearly see this if 1861 |
| forms." If 1872 |
|
| → recent and extinct species 1861 1866 1869 |
| species, recent and extinct, 1872 |
|
| → for in this case 1861 1866 1869 |
| OMIT 1872 |
|
| → in most cases 1861 1866 1869 |
| OMIT 1872 |
|
|
collected from many places; and
→in the case of
fossil species this
rarely be
→effected by palæontologists. We shall, perhaps, best perceive the improbability of our being enabled to connect species by
fine,
fossil links, by asking
→OMIT
whether, for instance, geologists at some future period will be able to
that our different breeds of cattle, sheep, horses, and dogs
descended from a single stock or from several aboriginal stocks; or, again, whether certain sea-shells inhabiting the shores of North America, which are ranked by some conchologists as distinct species from their European representatives, and by other conchologists as
→only
varieties, are really
or are, as it is called, specifically distinct. This could be effected
→only by the future geologist
discovering in a fossil state numerous intermediate
and such success
→is
improbable in the highest degree. |
|
| It has been asserted over and over again, by writers who believe in the immutability of species, that geology
no linking forms. This
→is entirely
erroneous. As
Lubbock has
remarked,
species is a link between other allied
→forms." We clearly see this if
we take a genus having a score of
→recent and extinct species
and destroy four-fifths of
→for in this case
no one
that the remainder will stand much more distinct from each other. If the extreme forms in the genus happen to have been thus destroyed, the genus itself
→in most cases
will stand more distinct from other allied genera. The camel and the pig, or the horse and the tapir, are now obviously very distinct forms; but if we add the several fossil quadrupeds which have already been discovered to the families including the camel and pig, these forms become joined by links not extremely wide apart. The
|
