the structure of the embryo is even more important for classification than that of the adult. ↑| 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 |
| ..... 1869 1872 | | at present 1859 1860 1861 1866 |
| 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 |
| assured 1859 1860 1861 1869 1872 | | almost assured 1866 |
| all are 1869 1872 | | have both 1859 1860 1861 | | have 1866 |
| one parent-form, 1869 1872 |
| the same or nearly similar parents, 1859 1860 1861 |
| the same parent-form, 1866 |
| 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 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 |
| descent. 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 |
| Even in groups, in which 1869 |
| It will reveal this community of descent, however much the structure of 1859 1860 1861 |
| Community of descent will, however, often be revealed, although the structure of 1866 |
| adults 1869 | | adult 1859 1860 1861 1866 |
| ..... 1869 | | may 1859 1860 1861 1866 |
| modified to an extreme degree, community of origin is often revealed by the structure of the larvæ; 1869 |
| modified and obscured; 1859 1860 1861 |
| greatly modified and thus obscured; 1866 |
| cirripedes, 1866 1869 | | cirripedes 1859 1860 1861 |
| though externally so like shell-fish, are 1869 |
| can 1859 1860 1861 |
| though externally so like shellfish, can 1866 |
| known 1869 | | be recognised 1859 1860 1861 1866 |
| to belong 1869 | | as belonging 1859 1860 1861 1866 |
| structure of the embryo generally 1869 |
| embryonic state of each species and group of species partially 1859 1860 1861 |
| embryonic state of each species and group of species 1866 |
| embryo often 1872 |
| more or less plainly the 1869 1872 |
| the 1859 1860 1861 |
| more or less completely the 1866 |
| its 1869 | | their 1859 1860 1861 1866 | | the 1872 |
| and ancient progenitor, 1869 |
| ancient progenitors, 1859 1860 1861 1866 |
| and ancient progenitor of the group, 1872 |
| ..... 1866 1869 1872 | | clearly 1859 1860 1861 |
| so often resemble 1869 |
| of life should resemble 1859 1860 1861 1866 |
| so often resemble in their adult state 1872 |
| OMIT 1869 1872 |
| their descendants,— our 1859 1860 1861 |
| our 1866 |
| species in the same class. 1869 |
| species. 1859 1860 1861 |
| species, their descendants. 1866 |
| species of the same class. 1872 |
| universal law 1869 1872 | | law 1859 1860 1861 1866 |
| and I hope 1869 |
| but I am bound to confess that I only hope 1859 1860 1861 1866 |
| and we may hope hereafter 1872 |
| it hereafter shown in most cases 1869 |
| the law hereafter proved 1859 1860 1861 1866 |
| the law proved 1872 |
| can, 1869 1872 | | can 1859 1860 1861 1866 |
| however, be 1869 1872 | | be 1859 1860 1861 1866 |
| only in 1866 1869 1872 | | in 1859 1860 1861 |
| ..... 1866 1869 1872 | | alone 1859 1860 1861 |
| state 1869 1872 | | state, 1859 1860 1861 1866 |
| OMIT 1869 |
| now supposed to be represented in many embryos, 1859 |
| now supposed to be represented in existing embryos, 1860 1861 1866 |
| of the progenitor of the group 1872 |
| not 1859 1860 1861 1869 1872 | not 1866 |
| wholly obliterated 1869 | | obliterated, 1859 1860 1861 | | obliterated 1866 | | wholly obliterated, 1872 |
| either 1859 1860 1861 1869 1872 | | neither 1866 |
| ..... 1869 1872 | | the 1859 1860 1861 1866 |
| OMIT 1866 1869 1872 |
| in a long course of modification 1859 1860 1861 |
| supervened 1860 1861 1866 1869 1872 | | super- vened 1859 |
| period of growth, or 1861 1869 1872 |
| age, or 1859 1860 |
| period of growth, nor 1866 |
| such 1869 1872 | | the 1859 1860 1861 1866 |
| period 1859 1860 1861 1866 1869 | | age 1872 |
| ..... 1869 1872 | | supposed 1859 1860 1861 1866 |
| may be true, but yet, owing 1869 1872 |
| of resemblance of ancient forms of life 1859 1860 1861 1866 |
| OMIT 1869 1872 |
| embryonic stages of recent forms, may be true, but yet, owing to the 1859 1860 1861 1866 |
|
