of almost every kind are capable of reappearing after having been lost for a
great length of time. But it does not follow from this that in each particular
case certain characters will reappear; for instance, this will not occur when
a race is crossed with another endowed with prepotency of transmission.
Sometimes the power of reversion wholly fails, without our being able to
assign any cause for the failure: thus it has been stated that in a French
family in which 85 out of above 600 members, during six generations, had been
subject to night-blindness, "there has not been a single example of this
affection in the children of parents who were themselves free from it."
(13/20. Quoted by Mr. Sedgwick in 'Med.-Chirurg. Review' April 1861 page 485.
Dr. H. Dobell in 'Med.-Chirurg. Transactions' volume 46 gives an analogous
case in which, in a large family, fingers with thickened joints were
transmitted to several members during five generations; but when the blemish
once disappeared it never reappeared.)

REVERSION THROUGH BUD-PROPAGATION--PARTIAL REVERSION, BY SEGMENTS IN THE SAME
FLOWER OR FRUIT, OR IN DIFFERENT PARTS OF THE BODY IN THE SAME INDIVIDUAL
ANIMAL.

In the eleventh chapter many cases of reversion by buds, independently of
seminal generation, were given--as when a leaf-bud on a variegated, a curled,
or laciniated variety suddenly reassumes its proper character; or as when a
Provence-rose appears on a moss-rose, or a peach on a nectarine-tree. In some
of these cases only half the flower or fruit, or a smaller segment, or mere
stripes, reassume their former character; and here we have reversion by
segments. Vilmorin (13/21. Verlot 'Des Varietes' 1865 page 63.) has also
recorded several cases with plants derived from seed, of flowers reverting by
stripes or blotches to their primitive colours: he states that in all such
cases a white or pale-coloured variety must first be formed, and, when this is
propagated for a length of time by seed, striped seedlings occasionally make