INDEX 



723 



Testis (Cont.): 



crayfish, 202 



earthworm, 172 



fluke, human blood, 143 

 liver, 140 



frog, 342 



Hydra, 104, 105, 106, 115 



man, 341, 342, 553, 554 



planaria, 135 



pork tapeworm, 144 

 Testosterone, 554 

 Testudinata, 405, 429 

 Testudinidae, 407, 429 

 Testudo, 412 

 Tethya, 101 



Tetrabranchia, 282, 502 

 Tetrad, 574, 576, 577 

 Tetrahymena, 64, 65 

 Tetranychus, 275 

 Tetrahynchidae, 279 

 Tetrarfiynchus, 279 

 Tettigoniidae, 263 

 Texas blind snake, 430 



cattle tick, 275 



fever, 74 

 Thamnophis, 421 

 Thecamoebae, 39 

 Thelohania, 53 



Theory of continuity of germ 

 plasm, 563 



natural selection, 649 



organic evolution, 620 

 Theraphosidae, 277 

 Theria, 495 

 Theridiidae, 278 

 Theridion, 111, 11% 

 Thiamine, 521 

 Thigh bone, 501 

 Thomisidae, 278 

 Thoracic cavity, 331 



duct, 532 



vertebra, 501 

 Thoracolumbar nervous system, 



555 

 Thoracosteida, 395 

 Thorax, 230, 231, 501 

 "Thousand-legged" centipede, 227 

 Thrashers, 462 

 Thraupidae, 462 

 Thread, 110 

 Thrips, 229, 260, 263 

 Thrombin, 335, 526 

 Thrombocyte, 335 

 Thrombokinase, 527 

 Thrush, 462 

 Thymus, 439, 553 

 Thyone, 311, 313 

 Thyroid, 552, 553 

 Thyroxin, 519 



Thysanoptera, 229, 260, 263 

 Thysanura, 229, 239, 240, 241, 



260, 261 

 Tibia, 231, 233, 245, 501 

 Tibial artery, 338 



Tibial artery [Cont.) : 



spines, 231 

 Tibialis, anterior, 467 



anticus, 348 



longus, 347, 350 



posticus, 348, 350 

 Tibiofibula, 343, 346, 348 

 Tibiotarsus, 437 

 Tick, 268, 275, 277 



fever, 277 



paralysis, 277 

 Tiedemann's bodies, 304 

 Tiger, 486 



beetle, 255, 264 



moth, 264 



salamander, 397, 404 

 Timber rattlesnake, 430 



wolf, 495 

 Tinamiformes, 461 

 Tinamous, 461 

 Tineidae, 264 

 Tingidae, 263 

 Tipulidae, 265 

 Tissue, 84-86, 85, 529 



fluid, 86, 529 



space, 529 

 Titis monkey, 489 

 Titmice, 462 

 Toad, 325, 396, 401, 402, 404 



fishes, 395 

 Tocopherol, 524 

 Tongue, 330 



fish, 381 



frog, 331 



man, 515 



snake, 417 



worm, 315, 321 

 Tonicella, 300 

 Tooth shell, 283 

 Toothed carp, 395 



whales, 496 

 Toothless mammals, 485 

 Top minnow, 394, 395 

 Tornaria, 606 

 Tortoise, 405, 407,429 

 Tortricidae, 264 

 Toucan, 462 

 Touch, 547 

 Toxocara, 1 54 



Trachea, 224, 225, 441, 534, 537 

 Tracheal gills, 249 

 Tracheolc, 235, 237 

 Tract, feather, 435, 436 

 Transport in animals, 509 



of food, 87, 509 



of oxygen, 87, 509 



of waste products, 87, 509 

 Transverse di\'ision, 187 



muscle, 319, 347,467 



nerve, 135, 136 



process, 345, 502 

 Trap-door spider, 273 

 Trapezius, 467, 507 

 Tree, cricket, 250 



Tree (Cont.) : 



hog, 397, 402, 403 

 Hyla, 402 

 spring peeper, 402 



hopper, 264 



squirrel, 485 

 Trematoda, 134, 138, 140, 142, 



147 

 Trench fever, 262 

 Trepang, 312 

 Trial and error, 61 

 Triarthrus, 111 

 Triassic period, 617 

 Triceps, 348, 505 



brachii, 347, 348, 467 



femoris, 347, 350 

 Trichechus, 480, 496 

 Trichinella, 156, 158, 162 



life cycle, 158 

 Trichinelloidea, 161 

 Trichinosis, 1 56 

 Trichocyst, 55, 56, 57 

 Trichodina, 64 

 Trichomonas, 72, 73, 74 

 Trichoptcra, 229, 250, 260, 264 

 Trichuris, 157, 158 

 Trichuroidea, 161 

 Tricladida, 147 

 Tricuspid valve, 530 

 Tridacna, 300 



Trigeminal nerve, 351, 353, 546 

 Triglidae, 379 

 Trilobita, 221 

 Trilobite, 219 

 Trinema, 75 

 Trionychidae, 429 

 Triploblast stage, 477 

 Trochanter, 231, 233, 245 

 Trochlear nerve, 351, 353, 546 

 Trochophore larva, 165, 166, 185, 



188, 193, 289, 290 

 Trochozoan, 193 

 Troglodytidac, 462 

 Trogon, 433, 462 

 Trogoniformcs, 433, 462 

 Trombidiidae, 279 

 Trophoblast, 477 

 Trophoderm, 476 

 Trophozoites, 51,68,69,71 

 Tropical birds, 453, 461 

 Trout, 379, 394 



perches, 395 

 True frogs, 402 



bullfrog, 402 



eastern wood, 402 



green, 402 



leopard, 402 



pickerel, 402 

 True ribs, 501 

 Trumpet, 395 

 Trumpeter, 452 

 Truncus arteriosus, 336 

 Trunk, 321. 322 

 Trunkfish, 379, 395 



