the dark colour, the thick bristles, and great tusks of the wild boar; and the
young have reacquired longitudinal stripes. But even in the case of the pig,
Roulin describes the half-wild animals in different parts of South America as
differing in several respects. In Louisiana the pig (13/12. Dureau de la Malle
'Comptes Rendus' tome 41 1855 page 807. From the statements above given, the
author concludes that the wild pigs of Louisiana are not descended from the
European Sus scrofa.) has run wild, and is said to differ a little in form,
and much in colour, from the domestic animal, yet does not closely resemble
the wild boar of Europe. With pigeons and fowls (13/13. Capt. W. Allen, in his
'Expedition to the Niger' states that fowls have run wild on the island of
Annobon, and have become modified in form and voice. The account is so meagre
and vague that it did not appear to me worth copying; but I now find that
Dureau de la Malle ('Comptes Rendus' tome 41 1855 page 690) advances this as a
good instance of reversion to the primitive stock, and as confirmatory of a
still more vague statement in classical times by Varro.), it is not known what
variety was first turned out, nor what character the feral birds have assumed.
The guinea-fowl in the West Indies, when feral, seems to vary more than in the
domesticated state.

With respect to plants run wild, Dr. Hooker (13/14. 'Flora of Australia' 1859
Introduction page 9.) has strongly insisted on what slight evidence the common
belief in their reversion to a primitive state rests. Godron (13/15. 'De
l'Espece' tome 2 pages 54, 58, 60.) describes wild turnips, carrots, and
celery; but these plants in their cultivated state hardly differ from their
wild prototypes, except in the succulency and enlargement of certain parts,--
characters which would certainly be lost by plants growing in poor soil and
struggling with other plants. No cultivated plant has run wild on so enormous
a scale as the cardoon (Cynara cardunculus) in La Plata. Every botanist who
has seen it growing there, in vast beds, as high as a horse's back, has been
struck with its peculiar appearance; but whether it differs in any important