302;
double-tailed lizards, ii. 341.
HUNTER, W., evidence against the influence of imagination upon the
offspring, ii. 264.
HUTTON, Capt., on the variability of the silk moth, i. 303;
on the number of species of silkworms, i. 300;
markings of silkworms, i. 302;
domestication of the rock-pigeon in India, i. 185;
domestication and crossing of _Gallus bankiva_, i. 236.
HUTCHINSON, Col., liability of dogs to distemper, i. 35.
HUXLEY, Prof., on the transmission of polydactylism, ii. 13;
on unconscious selection, ii. 194;
on correlation in the mollusca, ii. 320;
on gemmation and fission, ii. 359;
development of star-fishes, ii. 366.
HYACINTHS, i. 370-371;
bud-variation in, i. 385;
graft-hybrid by union of half bulbs of, i. 395;
white, reproduced by seed, ii. 20;
red, ii. 229, 336;
varieties of, recognisable by the bulb, ii. 251.
HYACINTH, feather, ii. 185, 316.
_Hyacinthus orientalis_, i. 370.
_Hybiscus syriacus_, ii. 286.
HYBRIDS, of hare and rabbit, i. 105;
of various species of _Gallus_, i. 234-236;
of almond, peach, and nectarine, i. 339;
naturally produced, of species of _Cytisus_, i. 390;
from twin-seed of _Fuchsia coccinea_ and _fulgens_, i. 391;
reversion of, i. 392-394, ii. 36, 48-50;
from mare, ass, and zebra, ii. 42;
of tame animals, wildness of, ii. 44-46;
female instincts of sterile male, ii. 52;
transmission and blending of characters in, ii. 92-95;
breed better with parent species than with each other, ii. 131;
self-impotence in, ii. 138-140;
readily produced in captivity, ii. 151.
HYBRIDISATION, singular effects of, in oranges, i. 336;
of cherries, i. 347;
difficulty of, in _Cucurbitae_, i. 358;
of roses, i. 366.
HYBRIDISM, ii. 178-191;
the cause of a tendency to double flowers, ii. 171;
in relation to pangenesis, ii. 385.
HYBRIDITY in cats, i. 44-45;
supposed of peach and nectarine, i. 342.
_Hydra_, i. 374, ii. 293, 359.
HYDRANGEA, colour of flowers of, influenced by alum, ii. 277.
HYDROCELE, ii. 52.
HYDROCEPHALUS, ii. 295.
_Hypericum calycinum_, ii. 170.
_Hypericum crispum_, ii. 227, 337.
HYPERMETAMORPHOSIS, ii. 367.
HYPERMETROPIA, hereditary, ii. 8.

ICHTHYOPTERYGIA, number of digits in the, ii. 16.
_Ilex aquifolium_, ii. 19.
IMAGINATION, supposed effect of, on offspring, ii. 263.
_Imatophyllum miniatum_, bu