As all the organic beings, extinct and recent, which have ever
lived | lived 1859 1860 1861 1866 | | lived, 1869 1872 |
| on this earth, have to be classed together, 1866 |
| on this earth have to be classed together, 1859 1860 1861 |
| can be arranged within a few great classes; 1869 1872 |
| have 1859 1860 1861 1866 |
| within each class have, according to our theory, formerly 1869 |
| within each class have, according to our theory, 1872 |
| by fine 1861 1866 |
| by the finest 1859 1860 |
| together by fine 1869 1872 |
| or, 1866 | | or indeed, 1859 1860 1861 | | and, 1869 1872 |
| genealogical; 1861 1866 1869 1872 | | genealogical. 1859 1860 |
| descent 1861 1866 1869 1872 | | Descent 1859 1860 |
| on this view 1866 |
| on my view 1859 1860 1861 |
| OMIT 1869 1872 |
| natural 1859 1860 1861 1866 | | Natural 1869 1872 |
| system. 1859 1860 1861 1866 | | System. 1869 1872 |
| naturalists, 1859 1860 1861 1866 1872 | | natu- ralists, 1869 |
| 1 blocks not present in 1866 1869 1872; present in 1859 1860 1861 | | For the embryo is the animal in its less modified state; and in so far it reveals the structure of its progenitor.
|
| or more groups 1866 1869 1872 |
| groups 1859 1860 1861 |
| animals, 1860 1861 1866 1869 1872 | | animal, 1859 |
| at present 1859 1860 1861 1866 | at present 1869 1872 |
| habits, 1859 1860 1861 1866 1869 | | habits 1872 |
| if 1859 1860 1861 1866 1869 |
| in their adult condition, if 1872 |
| closely 1866 1869 1872 |
| the same or 1859 1860 1861 |
| almost assured 1866 | | assured 1859 1860 1861 1869 1872 |
| have 1866 | | have both 1859 1860 1861 | | all are 1869 1872 |
| the same parent-form, 1866 |
| the same or nearly similar parents, 1859 1860 1861 |
| one parent-form, 1869 1872 |
| OMIT 1866 1869 1872 |
| in that degree 1859 1860 1861 |
| descent; but dissimilarity in embryonic development does not prove discommunity of descent, for in one of two groups all the developmental stages may have been suppressed, or may have been so greatly modified as no longer to be recognised, through adaptations, during the earlier periods of growth, to new habits of life. 1866 |
| descent. 1859 1860 1861 |
| descent; but dissimilarity in embryonic development does not prove discommunity of descent, for in one of two groups the developmental stages may have been suppressed, or may have been so greatly modified through adaptation to new habits of life, as to be no longer recognisable. 1869 1872 |
| Community of descent will, however, often be revealed, although the structure of 1866 |
| It will reveal this community of descent, however much the structure of 1859 1860 1861 |
| Even in groups, in which 1869 |
| adult 1859 1860 1861 1866 | | adults 1869 |
| may 1859 1860 1861 1866 | may 1869 |
| greatly modified and thus obscured; 1866 |
| modified and obscured; 1859 1860 1861 |
| modified to an extreme degree, community of origin is often revealed by the structure of the larvæ; 1869 |
| cirripedes, 1866 1869 | | cirripedes 1859 1860 1861 |
| though externally so like shellfish, can 1866 |
| can 1859 1860 1861 |
| though externally so like shell-fish, are 1869 |
| be recognised 1859 1860 1861 1866 | | known 1869 |
| as belonging 1859 1860 1861 1866 | | to belong 1869 |
| embryonic state of each species and group of species 1866 |
| embryonic state of each species and group of species partially 1859 1860 1861 |
| structure of the embryo generally 1869 |
| embryo often 1872 |
| more or less completely the 1866 |
| the 1859 1860 1861 |
| more or less plainly the 1869 1872 |
| their 1859 1860 1861 1866 | | its 1869 | | the 1872 |
| ancient progenitors, 1859 1860 1861 1866 |
| and ancient progenitor, 1869 |
| and ancient progenitor of the group, 1872 |
| ..... 1866 1869 1872 | | clearly 1859 1860 1861 |
| of life should resemble 1859 1860 1861 1866 |
| so often resemble 1869 |
| so often resemble in their adult state 1872 |
| our 1866 |
| their descendants,— our 1859 1860 1861 |
| OMIT 1869 1872 |
| species, their descendants. 1866 |
| species. 1859 1860 1861 |
| species in the same class. 1869 |
| species of the same class. 1872 |
| law 1859 1860 1861 1866 | | universal law 1869 1872 |
| but I am bound to confess that I only hope 1859 1860 1861 1866 |
| and I hope 1869 |
| and we may hope hereafter 1872 |
|
