- Tadpole, growth of, 83, 114, 138, 153
- Tait, P. G., 35, 43, 207, 644
- Taonia, 355, 356
- Tapetum, 407
- Tapir, 741, 763
- Taylor, W. W., 277, 282, 426, 428
- Teeth, 424, 612, 632
- Telescopium, 557
- Telesius, Bernardinus, 656
- Tellina, 562
- Temperature coefficient, 109
- Terebra, 529, 557, 559
- Terebratula, 568, 574, 576
- Teredo, 414
- Terni, T., 35
- Terquem, O., 329
- Tesch, J. J., 573
- Tetractinellida, 443, 450
- Tetrahedral symmetry, 315, 396, 476
- Tetrakaidecahedron, 337
- Tetraspores, 396
- Textularia, 604
- Thamnastraea, 327
- Thayer, J. E., 672
- Thecidium, 570
- Thecosmilia, 325
- Thûˋel, H., 451
- Thienemann, F. A. L., 653
- Thistle, capitulum of, 639
- Thoma, R., 666
- Thomson, James, 18, 259; J. A., 465; J. J., 235, 280; Wyville, 466
- Thurammina, 256
- Thyroid gland, 136
- Time-element, 51, 496, etc.; time-energy diagram, 63
- Tintinnus, 248
Table of Contents
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