INDEX 



579 



Taste buds, 477 



Taxonomy, 2 



Teeth, 428 



Teleostomi, 240, 242 



Telophase, 501 



Temperature, 490 



Temperature in birds, 355 



Tennant, 138 



Teredo navalis, 151 



Termites, 179 



Terns, 338, 339 



Terrapins, 304 



Testis, 444 



Tetrad, 446, 504, 505 



Texas rattlesnake, 323, 324 



Thales, 510 



Thamnophis, garter snake, 315 



Theories of heredity and evolution, 509 



Theories of the origin of vertebrates, 216- 



220 

 Therapsida, 300, 331 

 Thibetan Yak, 407 

 Thief ants, 484 

 Thoracic duct, 433 

 Thorn-headed worms, 96 

 Three banded armadillo, 397 

 Three-toed sloth, 397 

 Thresher shark, 225 

 Thrips, 180 

 Thrombocytes, 456 

 Thymus, 446 

 Thyroid, 445 

 Thyroxin, 445 

 Thysanoptera, 180 

 Thysanura, 178 

 Ticks, 194 



Tiedemann's vesicles, 132, 133 

 Tiger, 381 

 Tiger beetle, 194 

 Tiger salamander, 268 

 Tinamous, 335 



Tissue survival outside the body, 495 

 Toads in stone, 300 

 Tongue, 429 



Tongue in the humming bird, 359 

 Tongue in the woodpecker, 359 

 Top minnow, 245 

 Tortoises, 304 



. Toucan, 350 

 Touch of crayfish, 167 

 Toxicity of snake venoms, 328 

 Transmission of an impulse, 477 

 Treatment of snake bite, 329 

 Tree crickets, 180 

 Tree frogs, 270 

 Trematoda, 74 

 Trembley, 68, 70 

 Trepang, 141 

 Trichinella spiralis, 95 

 Trichinellidae, 95 

 Trichinosis, 95 

 Trichocephalus, 94 

 Trichocysts, 32 

 Trichoptera, 185 

 Trichuridae, 93 

 Tri hybrids, 522 

 Trilobites, 207 

 Trochelminthes, 1 21-126 

 Trochophore in Annelida, loi 

 Trochophore larva, of Rotifera, 125 

 Trochophore, molluscan, 146 

 Troost's terrapin, 305 

 Tropic birds, 341 

 Tropisms, 25 

 True buffaloes, 407 

 True crickets, 180 

 True pigeons, 344 

 True seals, 389 

 Trumpeter swan, 339 

 Trypanosoma gambiense, 29 

 Trypsinogen, 432 

 Tse-tse fly, 29 

 Tubifex, 105 

 Tubinares, 338 

 Tularemia, in rabbits, 396; in ruffed 



grouse, 343 

 Tuna, 249 

 Turacin, 356 

 Turbellaria, 71, 72 

 Turkeys, 495 

 Turkey buzzard, 347 

 Turtles, 304 

 Tussock moth, 187 

 Twins, Lumbricus, 113 

 Two-humped Bactrian camel, 402 

 Two-spined stickelback, 246 



