orth American wild Turkey, i. 292-293;
breeds of, i. 293;
crested white cock, i. 293;
wild, characters of, i. 293-294;
degeneration of, in India, i. 294, ii. 278;
failure of eggs of, in Delhi, ii. 161;
feral on the Parana, i. 190;
change produced in by domestication, ii. 262.
TURKEY, striped young pigs in, i. 76.
TURNER (pigeon), i. 156.
TURNER, W., on compensation in arteries and veins, ii. 300;
on cells, ii. 370.
TURNIPS, origin of, i. 325;
reversion in, ii. 31;
run wild, ii. 33;
crosses of, ii. 93, 96;
Swedish, preferred by hares, ii. 232;
acclimatisation of, in India, ii. 311.
TURNSPIT, on an Egyptian monument, i. 17;
crosses of the, ii. 92.
TURTLE-DOVE, white and coloured, crossing of, ii. 92.
_Turtur auritus_, hybrids of, with _T. cambayensis_ and _T. suratensis_,
i. 194.
_Turtur risorius_, crossing of, with the common pigeon, i. 193;
hybrid of, with _T. vulgaris_, _ibid._
_Turtur suratensis_, sterile hybrids of, with _T. vulgaris_, i. 193;
hybrids of, with _T. auritus_, i. 194.
_Turtur vulgaris_, crossing of, with the common pigeon, i. 193;
hybrid of, with _T. risorius_, _ibid._;
sterile hybrids of, with _T. suratensis_ and _Ectopistes migratorius_,
_ibid._
TUSKS of wild and domesticated pigs, i. 76, 77.
_Tussilago farfara_, variegated, i. 384.
TWIN-SEED _Fuchsia coccinea_ and _fulgens_, i. 391.
TYERMAN, B., on the pigs of the Pacific islands, i. 70, ii. 87;
on the dogs of the Pacific islands, ii. 87.
TYLOR, Mr., on the prohibition of consanguineous marriages, ii. 122-123.

UDDERS, development of the, ii. 300.
_Ulex_, double-flowered, ii. 167.
_Ulmus campestris_ and _effusa_, hybrids of, ii. 130.
UNIFORMITY of character, maintained by crossing, ii. 85-90.
UNITS of the body, functional independence of the, ii. 368-371.
UNITY or plurality of origin of organisms, i. 13.
UPAS poison, ii. 380.
UREA, secretion of, ii. 380.
USE and disuse of parts, effects of, ii. 295-303, 352-353, 418-419;
in rabbits, i. 124-128;
in ducks, i. 284-286.
UTILITY, considerations of, leading to uniformity, ii. 241.

VALENTIN, experimental production of double monsters by, ii. 340.
_Vallota_, ii. 139.
VAN BECK, Barbara, a hairy-faced woman, ii. 4.
VAN MONS on wild fruit-trees, i. 312, ii. 260;
production of varieties of the vine, i. 333;
correlated variability i