668 



INDEX 



Testis, 415 

 Tetanus, 396, 634 

 Tetrads, 176 

 Tetrapoda, 68, 109 

 Texas fever, 620 

 Thallophyta, 69 

 Thallophytes, 168 

 Theophrastus, 570 

 Theridium, 520 

 Thistles, 493, 505 

 Threadworms, 87 

 Thoracic basket, 329, 330 

 Thoracic cavity, 318 

 Thoracic duct, 298, 304 

 Thoracicolumbar, 354 

 Thoracic segments, insect, 201 

 Thorax, 543 



bee, 202, 206-208 

 Thymus, 398 

 Thyone, 95 



Thyreotropic hormone, 401 

 Thyroid, S94, 395, 396, 397 

 Thyroxin, 394 

 Thysanoptera, 101 

 Thysanura, 99 

 Tibia, 332 



insect, 206, 207 

 Tick, 620 



Tidal shore habitat, 18 

 Time, 473, 553 

 Time-scale, 476 

 Tissue formation, 422 

 Tissues 



animal, ^4^-148 



circulatory, U6, 147, 148 



classification of, 144 



conducting, H5, 146 



epithelial, 146, 147 



fundamental, 144, 145 



meristemic, 145, 146 



muscular, 146, 147 



nervous, I46, 148 



plant, 144, I45, 146 



protective, 144, 145 



reproductive, I46, 148 



supporting, I46, 147 

 Tmesipteris, 75 

 Toad, 492 



economic value of, 577 

 Toadstool, 519 

 Tools, 546, 550 

 Totipotent eggs, 432 

 Touch, 545 

 Toxin-antitoxin, 633 

 Toxoid, 633 

 Trachea, 317 

 Tracheae, insects, 210 

 Tracheal system, 302 



of worker bee, 210 



Tracheophyta, 75 

 Tracks, 479 

 Traits, 640 

 Translocation, 457 

 Transpiration, 266-268 



experiments to show, 266 



loss of water by, 267 

 Transverse commissure, 344 

 Tree, 240 



Tree shrews, 534, 540 

 Trees, 493 

 Trematoda, 85, 219 

 Trematode, complex cycle of, 231 

 Triassic period, 476, 513 

 Triceps, 338 

 Trichamophora, 71 

 Trichinella, 87, 615 

 Trichinella spiralis, 225 



life cycle of, 226 

 Trichocysts, 158 

 Trichoptera, 102 

 Tricuspid valve, 307 

 Trihybrids, 447, 448, 449 

 Trilobites, 513 

 Triploblastic, 68 

 Trochanter, 206, 207 

 Trochelminthes, 89, 103 

 Tropical rain forest, 28 

 Tropisms, 364, 367-369 

 Trypanosoma, 77, 103 

 Trypanosomes, 220, 620 

 Trypsin, 295 

 Tschermak, 443 

 Tsetse fly, 511 

 Tube-feet, 336, 344 

 Tuberculosis 



bovine, 623 



cause of, 623 



cure for, 624 



death rate of, 623, 624 

 Tuna, 545 



Tunicates, 105, 329, 499 ] 

 Tupaia, 534 

 Turbellaria, 85 

 Turks, 561 

 Turk's saddle, 350 

 Turkeys, 114 



Turtles, 103, 111, 328, 334, 514 

 Twins, identical, 471 

 'Twixt-brain, 346, 348 

 Tympanic membrane, 362 

 Tyndall, 407 



Typhlosole, earthworm, 189, 283 

 Typhoid, 629-630 

 Typhoid Mary, 490, 630 

 Typhus, 619-620 



Ulna, 332 

 Ulopteryx, 71 



