Tongue, relation of, to the beak in pigeons, i. 168.
Tooth, occurrence of a molar, in place of an incisor, ii. [391].
"Torfschwein," i. 68.
Trail, R., on the union of half-tubers of different kinds of potatoes, i. 395.
Trees, varieties of, suddenly produced, i. 361;
weeping or pendulous, i. 361;
fastigate or pyramidal, i. 361;
with variegated or changed foliage, i. 362;
early or late in leaf, i. 362-363;
forest, non-application of selection to, ii. [237].