Comparison with 1872 |
|
Devonshire and Welsh ponies, Devonshire and Welsh ponies, 1872 |
Welch pony, 1859 1860 |
Devonshire and Welch ponies, 1861 1866 1869 |
and even had some zebra-like stripes on the sides of its face. With respect to this last fact, I was so convinced that not even a stripe of colour appears from what would
commonly be
called an accident,
that I was led solely from the occurrence of the face-stripes on this hybrid from the ass and hemionus,
to ask Colonel Poole whether such face-stripes ever occur
in the eminently striped Kattywar breed of horses, and was, as we have seen, answered in the affirmative. |
|
What now are we to say to these several facts? We see several
....... 1872 | very 1859 1860 1861 1866 1869 |
distinct species of the horse-genus becoming, by simple variation, striped on the legs like a zebra, or striped on the shoulders like an ass. In the horse we see this tendency strong whenever a dun tint
appears— appears— 1859 1860 1861 1872 | appears — 1866 1869 |
a tint which approaches to that of the general colouring of the other species of the genus. The appearance of the stripes is not accompanied by any change of form or by any other new character. We see this tendency to become striped most strongly displayed in hybrids from between several of the most distinct species. Now observe the case of the several breeds of pigeons: they are descended from a pigeon (including two or three sub-species or geographical races) of a bluish colour, with certain bars and other marks; and when any breed assumes by simple variation a bluish tint, these bars and other marks invariably reappear; but without any other change of form or character. When the oldest and truest breeds of various colours are crossed, we see a strong tendency for the blue tint and bars and marks to reappear in the mongrels. I have stated that the most probable hypothesis to account for the reappearance of very ancient characters,
is— is— 1859 1860 1861 1872 | is — 1866 1869 |
that there is a
tendency
in the young of each successive generation to produce the long-lost character, and that
|
Devonshire and Welch ponies, Devonshire and Welch ponies, 1861 1866 1869 |
Welch pony, 1859 1860 |
Devonshire and Welsh ponies, 1872 |
and even had some zebra-like stripes on the sides of its face. With respect to this last fact, I was so convinced that not even a stripe of colour appears from what
is is 1866 1869 1872 | would 1859 1860 1861 |
commonly
....... 1866 1869 1872 | be 1859 1860 1861 |
called
chance, chance, 1866 1869 1872 |
an accident, 1859 1861 |
an acci- dent, 1860 |
that I was led solely from the occurrence of the face-stripes on this hybrid from the ass and
hemionus hemionus 1860 1861 1866 1869 1872 | hemionus, 1859 |
to ask Colonel Poole whether such face-stripes ever
occurred occurred 1866 1869 1872 | occur 1859 1860 1861 |
in the eminently striped Kattywar breed of horses, and was, as we have seen, answered in the affirmative. |
|
What now are we to say to these several facts? We see several
very very 1859 1860 1861 1866 1869 | very 1872 |
distinct species of the horse-genus becoming, by simple variation, striped on the legs like a zebra, or striped on the shoulders like an ass. In the horse we see this tendency strong whenever a dun tint
appears — appears — 1866 1869 | appears— 1859 1860 1861 1872 |
a tint which approaches to that of the general colouring of the other species of the genus. The appearance of the stripes is not accompanied by any change of form or by any other new character. We see this tendency to become striped most strongly displayed in hybrids from between several of the most distinct species. Now observe the case of the several breeds of pigeons: they are descended from a pigeon (including two or three sub-species or geographical races) of a bluish colour, with certain bars and other marks; and when any breed assumes by simple variation a bluish tint, these bars and other marks invariably reappear; but without any other change of form or character. When the oldest and truest breeds of various colours are crossed, we see a strong tendency for the blue tint and bars and marks to reappear in the mongrels. I have stated that the most probable hypothesis to account for the reappearance of very ancient characters,
is — is — 1866 1869 | is— 1859 1860 1861 1872 |
that there is a
tendency
in the young of each successive generation to produce the long-lost character, and that
|