at a very early age for their own wants, and | at a very early age for their own wants, and 1869 1872 |
| for their own wants at a very early stage of development, and secondly, 1859 1860 1861 |
| at a very early stage of development for their own wants, and secondly, 1866 |
| OMIT 1869 1872 |
| exactly 1859 1860 1861 |
| (and this might often be of advantage to a species) exactly 1866 |
| their 1869 1872 | | the 1859 1860 1861 1866 |
| that 1869 1872 | | of 1859 1860 1861 1866 |
| they 1869 1872 | | the 1859 1860 1861 1866 |
| OMIT 1869 1872 |
| species, that the child 1859 1860 1861 1866 |
| OMIT 1869 1872 |
| at a very early age 1859 1860 1861 1866 |
| as their parents. 1869 1872 |
| with its parents, in accordance with their similar habits. 1859 1860 1861 1866 |
| 1 blocks not present in 1859 1860 1861 1869; present in 1866 1872 | | Again, with respect to the singular fact of so
many terrestrial and fresh-water animals not
undergoing
any metamorphosis, whilst the
marine members of the same classes
pass through various transformations, Fritz Müller
has suggested that if
an animal during a long succession of generations had to change its habits from living
in the sea
to living on the land or in fresh-water, it
would be a
great
advantage to its descendants during their modification if they were to lose their metamorphoses;
for it is not probable that places well adapted for both the larval and mature stages, under such new and greatly changed habits of life, could
be
found unoccupied or ill-occupied by other organisms.
|
| In this case 1869 |
| Therefore the modification of a marine animal into a terrestrial or fresh-water one would generally be much more easily effected, if its metamorphoses were suppressed through 1866 |
|
structure would be favoured by natural selection, and all traces of former metamorphoses would finally be lost.
1869 |
| structure. 1866 |
| Again, with respect to the singular fact of so many terrestrial and fresh-water animals not undergoing any metamorphosis, whilst marine members 1869 |
| In this case the gradual acquirement at an earlier and earlier age 1872 |
| same groups pass through various transformations, Fritz Müller has suggested that the process of slowly modifying and adapting an animal to live on the land or in fresh water, instead of in the sea, 1869 |
| adult structure 1872 |
| greatly simplified by its not passing through any larval stage; for it is not probable that places well adapted for both the larval and mature stages, under such new and greatly changed habits of life, could be found unoccupied or ill-occupied by other organisms. 1869 |
|
favoured by natural selection; and all traces of former metamorphoses would finally be lost.
1872 |
| of an animal to 1869 1872 |
| to 1859 1860 1861 |
| slightly 1869 1872 |
| in any degree 1859 1860 1861 |
| the parent-form, 1869 1872 | | their parent, 1859 1860 1861 |
| in 1859 1860 1861 1869 | | on 1872 |
| manner, 1859 1860 1861 1869 |
| plan, or if it profited a larva already different from its parent to change still further, 1872 |
| or if it profited a larva already widely different from its parent to change still further, then, 1869 |
| then, 1859 1860 1861 1872 |
| ..... 1869 1872 | | active 1859 1860 1861 |
| the larvæ might 1869 1872 |
| larvæ might easily 1859 1860 |
| larvæ might 1861 |
| more and more different 1869 1872 |
| different to any conceivable extent 1859 1860 1861 |
| parents to any conceivable extent. 1869 1872 |
| parents. 1859 1860 1861 |
| ..... 1869 1872 | | Such 1859 1860 1861 |
| Differences 1869 1872 | | differences 1859 1860 1861 |
| in the larvæ might, 1869 |
| might, 1859 1860 1861 |
| in the larva might, 1872 |
| development; 1859 1860 1861 1869 | | its development; 1872 |
| larvæ, 1859 1860 1869 | | larvæ 1861 | | larva, 1872 |
| come to differ 1869 1872 |
| differ 1859 1860 1861 |
| larvæ 1859 1860 1861 1869 | | larva 1872 |
| is 1869 1872 |
| we have seen to be 1859 1860 1861 |
| many animals. 1869 1872 | | cirripedes. 1859 1860 1861 |
| also become 1869 1872 | | become 1859 1860 1861 |
| ..... 1869 1872 | | final 1859 1860 1861 |
| OMIT 1869 1872 |
| said to be 1859 1860 1861 |
|
