INDEX. 



701 



Thoracic fin, 526, 562 

 ThoracDStraca, 427 

 Thread cells, 229 

 Thrips, 479 

 Thrushes, 616 

 Thylacinus, 633 

 Thymus gland, 547, 577 

 Thyone, 349 

 Thyroid gland, 547 

 Thysanoptera, 479 

 Thysanozoon, 271 

 Thysanura, 477 

 Tiara, 236 

 Tiaris. 242 

 Tibia, 463, 529 

 Tibiale, 529 

 Tibio-tarsus, 607 

 Ticks, 454 

 Tick, sheep, 493 

 Tiedemann's vesicles, 331 

 Tiger, 647 

 Tiger beetles, 484 

 Tillodontia, 643 

 Tima, 242 

 Tinea, 494 

 Tiijeidie, 494 

 I'ipulidas, 492 

 Tissues, 71 



Tissues, accessory, 99 

 Tissues, classification of, 72 

 Tissues, connective, 83 

 Tissues, elastic, 85 

 Tissues, epithelial. 73 

 Tissues, muscular, 91 

 Tissues, nervous, 94 

 Tissues, principal, 99 

 Tissues, tendinous, 85 

 Toad, horned, 599 

 Toads, 588 

 Tobacco worm, 495 

 Tocogony, 140 

 Tomato worm, 495 

 Tongue bone, 524 

 Toothed birds, 612 

 Tooth shells, 369 

 Tornaria, 513 

 Torpedinidce, 572 

 Torpedo, 572 



Tortoises, 594 

 Tortoise shell, 596 

 Tfjrtricidie, 494 

 Total cleavage, 152 

 Totipalmate foot, 614, 615 

 Toucans, 6i6 

 Toxiglossa, 380 

 Toxodontia, 643 

 Toxopneustes, 345 

 TrabecuUe, 520 

 Trachea, 109, 443, 458, 547 

 Tracheal gills, 469 

 Trachydermon, 357 

 TrachymedusK, 239, 242 

 Trachynema, 242 

 Tractus olfactorius, 534 

 Tragulidre, 642 

 Tragulus, 642 



Transverse commissure, 123 

 Transverse process, 518 

 Trapdoor spider, 453 

 Tree cricket, 481 

 Tree hoppers, 490 

 Tree toads, 588 

 Trematoda, 271 

 Triarthus, 415 

 Triassic, 180 

 Triaxonia, 226 

 I'richecliidDS, 648 

 Trichechus, 648 

 Trichina, 302 

 Trichocephalus, 302 

 Trichocysts, 205 

 Trichodectes, 479 

 Trichomonas, 202 

 Trichoplax, 220 

 Trichoptera, 483 

 Trichotrachelidee, 302 

 Triclalidae, 269, 271 

 Triconodont teeth, 626 

 Tridacna, 367 

 Trigeminal nerve, 536 

 TrilobitEe, 414 

 Trimera, 485 

 Trionychia, 596 

 Tristicta, 453 

 Tristonia. 274 

 Tritocerebrum, 462, 468 



