INDEX 



081 



Telepstomi, 59, 183 : Example, 183 : 

 Distinctive characters and classifica- 

 tion, 201 : External form, 209 : Exo- 

 skeleton, 212 : Endoskeleton, 213 : 

 Electric organs, 217 : Digestive organs, 

 217 : Respiratory organs, 218 : Air- 

 bladder, 220 : Heart, 222 : Brain, 222 : 

 Urinogenital organs, 222 : Reproduc- 

 tion and development, 225 : Geographi- 

 cal distribution, 226 : Distribution in 

 time, 226 



Terns, 388, 404 



Tenrec, 517 



Tentacles of Ascidia, 16 



Territorial plane, 482* 



Test of Urochorda, 12 



Testudo gnvca, 317 



Tetrao, 388 



Tetrazooids, 32" 



Thaliacea, 19* 



Theria, 448*, 552, 562 



Theriodontia, 313 



Theromorpha, 313*, 344 



Thomson, Vaughan, 642 



Thomson, Wyville, 643 



Thoracic duct, 542 



Thorax, 61*, 418 



Thornbacks, 157 



Thread-cells, Myxine, 129 



Three-toed Sloth See Sloth 



Thrushes, 389, 397 



Thylacine, 466, 492 



Thylacoleo carnifex, 569 



Thymus, of Craniata, 82 * : Elasmobran- 

 chii, 164 : Pigeon, 370 : Rabbit, 438 



Thyro-hyal, 481* 



Thyroid, of Craniata, 82 * : Elasmobran- 

 chii, 164 : Pigeon, 369 : Rabbit, 438 



Thyroid cartilage See Larynx 



Tibia, 76* See Limb-skeleton 



Tibiale, 77* See Limb-skeleton 



Tibio-tarsus, 365 



Tillodontia, 455, 574 



Tillotherium fodiens, 574 



Tinamus, 388, 399, 404, 414 



Toads, 245, 273, 276, 277 



Tongue, of Craniata, 81* See Digestive 

 organs 



Tooth-pulp, 80* 



Toothed Whales, 472, 499, 501, 571 



Tornaria, 6 



Torpedo, 163 



Tortoises, 60 



Toucans, 392 



Touch-cells, 100*, 101 



Touch corpuscles, 100*, 101 



Toxodon, 455 



Toxodonta, 455 



Trabeculte, 68, 69* 



Trabecular regions, 69* 



Trachea See Respiratory organs 



Trachinus, 212 



Trachypterus, 217 



Transverse process See Vertebra 

 Trapezium, 427 See Limb-skeleton of 



Mammalia 

 Trapezoid, 427 See Limb-skeleton of 



Mammalia 

 Tree-frogs, 276, 281 

 Tree-porcupines, 475 

 Tree-snakes, 312, 339 

 Treviranus, 637 

 Triassic period, 603 

 Trichechidw, 456, 475 

 Trichosurus, 551 

 Triconodont. 529* 

 Trituberculata, 529* 

 Trochilidce, 389 

 Trogons, 389 

 Trophoblast, 555*, 560 

 Tropidonotus natrix, 324 

 Trout, 205, 211 See Salmo fario 

 Trunk, of Elephant, 474 

 Trygon, 172 

 Trygonorhina, 161, 168 

 Tuatara, 317 

 Tuber cinereum, 492* 

 Tubercular facet, 420 

 Tunic of Urochorda, 12 

 Turbinares, 387 

 Turbot, 205, 225 

 Turdidce, 389 

 Turdus, 397 

 Turkey-buzzards, 388 

 Turnix, 388 

 Turtles, 313, 318, 332 

 Turtur, 388 

 Tusks See Teeth 

 Tyndall, J., 646 

 Typlilopidw, 325 

 Typhlosole of Ascidia, 16 : Petromyzon, 



121 



U 



(J INTATHERIUMt 455 



Ulna, 76* See Limb-skeleton 



Ulnare, 76* See Limb-skeleton 



Umbilical cord, 562* 



Unau, 469 



Unciform, 427 See Limb-skeleton of 



Mammalia 

 Uncinates of Reptiles, 320* : Pigeons, 



359 : Birds, 397 

 Ungulata, 452, 462 

 Ungulata vera, 452, 472, 509, 512, 532. 



543, 565, 572 

 Upupidce, 389 

 Urachus, 562* 

 Urethra, 550 

 Urinary bladder, 113 



Urinary tubules, 110*, 111 



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