Thoth-Nepenthes, peculiar course of, [208];
hibernation of, [315-324].
Titan, [305].
Triassic era, [136], [142], [152].
Trivium Charontis, canals and oases in, [251], [252], [256].
Twilight arc, shows thin air, [85], [162].
Uranus, [33].
Vegetation, [79], [119-127], [163], [166], [169], [301];
color of Mare Erythraeum, [122-126];
proof of, [170];