have been inherited by the females alone during ten
generations. In another case, a man thus deficient in both hands and
feet, transmitted the peculiarity to his two sons and one daughter; but
in the third generation, out of nineteen grandchildren, twelve sons had
the family defect, whilst the seven daughters were free. In ordinary
cases of sexual limitation, the sons or daughters inherit the
peculiarity, whatever it may be, from their father or mother, and
transmit it to their children of the same sex; but generally with the
haemorrhagic diathesis, and often with colour-blindness, and in some
other cases, the sons never inherit the peculiarity directly from their
fathers, but the daughters, and the daughters alone, transmit the
latent tendency, so that the sons of the daughters alone exhibit it.
Thus, the father, grandson, and great-great-grandson will exhibit a
peculiarity,--the grandmother, daughter, and great-granddaughter having
transmitted it in a latent state. Hence we have, as Mr. Sedgwick
remarks, a double kind of atavism or reversion; each grandson
apparently receiving and developing the peculiarity from his
grandfather, and each daughter apparently receiving the latent tendency
from her grandmother.

From the various facts recorded by Dr. Prosper Lucas, Mr. Sedgwick, and
others, there can be no doubt that peculiarities first appearing in
either sex, though not in any way necessarily or invariably connected
with that sex, strongly tend to be inherited by the offspring of the
same sex, but are often transmitted in a latent state through the
opposite sex.

Turning now to domesticated animals, we find that certain characters
not proper to the parent-species are often confined to, and inherited
by, one sex alone; but we do not know the history of the first
appearance of such characters. In the chapter on Sheep, we have seen
that the males of certain races differ greatly from the females in the
shape of their horns, these being absent in the ewes of some breeds, in
the development of fat in the tail in certain fat-tailed breeds, and in
the outline of the forehead. These differences, judging from the
character of the allied wild species, cannot be accounted for by
supposing that they have been derived from distinct parent-forms. There
is, also, a great difference between the ho