726 



INDEX 



Tortoises, 66 



Toucans, 421 



Touch-cells, 106, 107* 



Toiicjl corpuscles, 107* 



loxodontia, 608 



Trabeculee, 76* 



Trabpeulae, heart, 279 



Trabecular regions, 76* 



Trachea — See Respiratory organs 



Trachinus, 227 



Trachyptertis, 233 



Tragulicke, 631 



Transverse process — See Vertebra 



Trapezium, 456— See Limb-skeleton of 



Mammalia 

 Trapezoid, 456— See Limb-skeleton of 



Mammalia 

 Tree-frogs, 297, 298, 302 

 Tree-porcupines, 475 

 Tree Kangaroos, 496 

 Tree-snakes, 335, 367 

 Treviranus, 677 

 Triassic period, 639 

 TricTiechidoi, 484 — See Walruses 

 Trichosurus, 583 

 Triconodont, 561* 

 Trigeminal ganglion, 104* 

 Trigeminal nerve, 104, 160, 

 Tritor, 192* 

 Trituberoulata, 561* 

 Trochanter lesser, great, 323, 457 : 



third, 457 

 Trochilidce, 417, 436, 443 

 Trochlea, 456 

 Trochlear nerve, 104* 

 Trogones,- 417 

 Trogons, 417 

 Trophoblast, 588* 

 TropidonoUis natrix, 348 

 Trout, 198, 220, 227— See Salmo fario 

 Trunk, of Balanoglossus, 3 : Craniata, 



67 : Elephant, 505* 

 Trunk of spinal nerve, 99* 

 Trygon, 187 

 Trygonorhina, 173, 181 

 Tuatara, 339 — See Hatteria 

 Tuber cinereum, 471* 

 Tubercular facet, 448 

 Tuberoulum olfactorium, 254* 

 Tumblers, 378 

 Tunic of Urochorda, 15 

 Tunicates — see Urochordata 

 Tunicine, 14 

 Turbinal bone, 331 

 Turbinals, 405 



Turbiiares, 415, 425, 434, 436, 442 

 Turbot, 221, 241 

 Turdidce, 417 

 Turdua, . 425 

 Turkey-buzzards, 416 

 Tiirnix, 416 

 Turtles, 336, 341, 357, 359, 360, 368, 370 



Turtur, 416 



Tusks— See Teeth 



Tympanic bone, 453, 511 



Tympanic bulla, 450 



Tympanic cavity, 286 



Tympanic membrane, 265, 315 



Tympano-eustachian fossa, 319 



Tympanum of syrinx, 398 



Tyndall, J., 686 



TypMopidce, 349 



Typhlosoleof Ascidia, 16, 19 : Petromyzon, 



130, 134 

 Typotheria, 608 



U 



u. 



LNA, 82*, 83— See Limb-skeleton 



Ulnare, 83*— See Limb-skeleton 



Umbilical cord, 595* 



Umbilicus, inferior and superior, 381* 



Unau, 498 



Unciform, 456— See Limb-skeleton of 

 Mammalia 



Uncinates of Reptiles, 344* ; Pigeons, 

 386, 387* : Birds, 425 



Ungulata, 481*, 490, 501, 536-544, 564, 

 571, 575, 576, 606 



Ungulata vera, 481*, 505, 541, 544, 598 



Unguligrade, 481* 



Upper arm, 69, 314 



Upupidce, 417 



Uraohus, 595* 



Urethra, 474 



Urinary bladder, 120* 



Urinary tubules, 117* 



Unio, 621 



Urinogenital organs, of Craniata, 117, 

 118: Petromyzon, 134, 135 : Myxinoids, 

 141 : Dogfish, 163, 164, 165, 166 : 

 Elasmobranchii, 180 : Holoeephali, 195, 

 196 ; Trout, 215 : Teleostomi, 239, 

 240, 241 : Ceratodus, 254, 255 : Frog, 

 286, 287, 288 : Amphibia, 308, 309 : 

 Lizzard, 332, ' 333 : Beptilia, 362 : 

 Pigeon, 407, 408 : Aves, 435 : Rabbit, 

 473, 474, 475 : Mammalia, 582-585 



Urinogenital organs, development of, 119 



Urochorda, 14 : Example, 14 : Distinctive 

 characters and classification, 21 : 

 Systematic position of Example, 24 : 

 General features, 24 : Enteric canal, 

 29 ; Heart, 29 ; Nervous system and 

 sense-organs, 30 ; Renal organ, 30 : 

 Reproductive system, 31 : Develop- 

 ment and metamorphosis, 31 : Distribu- 

 tion, &c. , 42 : Affinities, 42 



Urodseum, ,397* 



Urodela, 293*, 294, 296, 297, 298, 299, 

 300, 302, 303, 304, 305, 306, 308, 309, 

 310, 312 



Uro-hyal, 207 



