| → becoming 1859 1860 1861 1866 1869 |
| not having become 1872 |
|
| → these species having 1859 1860 1861 1866 1869 |
| — these species presenting certain 1872 |
|
| → in certain respects, 1859 1860 1861 1866 1869 |
| OMIT 1872 |
|
| → in most other respects to 1859 1860 1861 1866 1869 |
| OMIT 1872 |
|
| → the 1859 1860 1861 1866 1869 |
| in most respects; — the occasional re-appearance of the 1872 |
|
| → marks occasionally appearing 1859 1860 |
| black marks occasionally appearing 1861 1866 1869 |
| black marks 1872 |
|
| → the 1859 1860 1861 1866 1869 |
| — and lastly, the 1872 |
|
| → I can feel no doubt 1859 1860 |
| we may safely conclude 1861 1866 1869 1872 |
|
| → Columba 1859 1860 1861 1866 1869 |
| rock-pigeon or Columba 1872 |
|
| → C. livia, or the rock-pigeon, 1859 1860 1861 1866 1869 |
| the wild C. livia 1872 |
|
| → an almost perfect series 1859 1860 1861 |
| in these two cases, and in some but not in all other cases, an almost perfect series 1866 1869 |
| OMIT 1872 |
|
| → extremes of structure. 1859 1860 1861 1866 1869 |
| and the rock pigeon, an almost perfect series; so we can in some other cases, but not with all the breeds. 1872 |
|
| → for 1859 1860 1861 1866 1869 |
| are in each eminently variable, for 1872 |
|
| → are in each breed eminently variable; 1859 1860 1861 1866 1869 |
| OMIT 1872 |
|