FISH, Mr., advantage of change of soil to plants, ii. 147.
FISHES, regeneration of portions of fins of, ii. 15;
variability of, when kept in tanks, ii. 259;
marine, living in fresh water, ii. 304;
double monsters of, ii. 340.
FISSION and gemmation, ii. 358.
FITCH, Mr., persistency of a variety of the pea, i. 329.
FITTEST, survival of the, i. 6.
FITZINGER, origin of sheep, i. 94;
African maned sheep, i. 96.
FIXEDNESS of character, conditions of, discussed, ii. 62-64.
FLAX, found in the Swiss lake-dwellings, i. 317;
climatal difference in products of, ii. 274.
FLEECE, fineness of, in Austrian merinos, ii. 197.
FLEISCHMANN, on German sheep crossed with merinos, ii. 88-89.
"FLORENTINER-TAUBE," i. 142-143.
FLOUNDER, ii. 53.
FLOURENS, crossing of wolf and dog, i. 32;
prepotency of the jackal over the dog, ii. 67;
hybrids of the horse and ass, ii. 68;
breeding of monkeys in Europe, ii. 153.
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FLOWER-GARDEN, earliest known, in Europe, ii. 217.
FLOWERS, capricious transmission of colour-varieties in, ii. 20-21;
tendency to uniformity in striped, ii. 70;
scorching of, dependent on colour, ii. 229;
change in, caused by conditions of life, ii. 273;
rudimentary, ii. 316;
relative position of, to the axis, ii. 345.
FOETATION, abdominal, ii. 294.
FOLEY, Mr., wild varieties of pears, ii. 260.
FOLIAGE, inherited peculiarities of, i. 362;
variegation, of, i. 366;
bud-variation in, i. 382-384.
FOOD, influence of, on the pig, i. 72;
on cattle, i. 91;
excess of, a cause of variability, ii. 257.
FORBES, D., on Chilian sheep, i. 95;
on the horses of Spain, Chili, and the Pampas, i. 52.
_Formica rufa_, ii. 251.
FORTUNE, R., sterility of the sweet potato in China, ii. 169;
development of axillary bulbs in the yam, _ibid._
FOWL, common, breeds of, i. 225-230;
supposed plurality of origin, i. 230;
early history of, i. 231-233;
causes of production of breeds of, i. 233;
origin of from _Gallus bankiva_, i. 236-239, 245;
feral, notices of, i. 237-238;
reversion and analogous variation in, i. 239-246, ii. 35, 38, 39, 40,
349, 350;
"cuckoo" sub-breeds of, i. 244;
history of, i. 246-247;
structural characters of, i. 247-250;
sexual peculiarities of, i. 251-257, ii. 74;
external differences of, i. 257-260;
differences of breeds of, from _G. bankiva_, i.