712 



INDEX 



Tree-frogs, 288, 289, 293 



Tree Kangaroos, 482 



Tree-snakes, 324, 356 



Treviranus, 656 



Triassic period, 619 



Trichechidce, 470 See Walruses 



Trichosurus, 567 



Triconodont teeth, 544* 



Trigeminal ganglion, 101* 



Trigeminal nerve, 101*, 154, 155, 156 



Tritor, 186*, 187 



Trituberculate molar, 544* 



Trochanter, lesser, great, 313, 444 : 

 third, 444 



Trochilidce, 404, 423, 429 



Trochlea, 442 



Trochlear nerve, 101* 



Trogones, 404 



Trogons, 404 

 Trophoblast, 570* 



Tropidonotus natrix, 337 



Trout, 192, 214, 220 See Salmo fario 



Trunk, of Balanc glosses, 3 : Craniata, 



65 : Elephant, 490* 

 Trunk of spinal nerve, 96* 

 Trunk region, 195 

 Trunk vertebra, 195 

 Trygon, 181 

 Trygonorhina, 168, 176 

 Tuatara, 329 See Hatteria 

 Tuber cinereum, 457* 

 Tubercular facet, 435 

 Tuberculum olfactorium, 247* 

 Tumblers, 367 

 Tunic, of Urochorda, 14* 

 Tunicates See Urochordata 

 Tunicine, 14* 

 Turbinal bone, 321 

 Turbinals, 393 



Turbinares, 402*, 412, 421, 423, 429 

 Turbot, 214, 235 

 Turdidce, 404 

 Turdus, 412 

 Turkey-buzzards, 403 

 Turnix, 403 

 Turtles, 325, 331, 346, 348, 349, 357, 



358 



Turtur, 404 

 Tusks See Teeth 

 Tympanic bone, 439, 497 

 Tympanic bulla, 437, 438 

 Tympanic cavity, 277, 278 

 Tympanic membrane, 257, 305* 

 Tympano-eustachian fossa, 309 

 Tympanum of syrinx, 385 

 Tyndall, J., 665 

 Typhlopidce, 338 

 Typhlosole, of Ascidia, 15, 18*: 



Petromyzon, 125, 130 

 Typotheria, 588 



U LSA, 80, 81* See Limb-skeleton 

 Ulnare, 80, 81* See Limb-skeleton 

 Umbilical cord, 577* 

 Umbilicus, inferior and superior, 369* 

 Unau, 483 

 Unciform, 443 See Limb-skeleton of 



Mammalia 

 Uncinates of Reptiles, 335* : Pigeons, 



374 : Birds, 412 

 Ungulata, 467*, 476, 486, 519-528. 



547, 553, 558, 579, 586 

 Ungulata vera, 467*, 486, 490, 525, 



527, 528, 579 

 Unguligrade feet, 467* 

 Unio, 601 



Upper arm, 67, 304 

 Upupidce, 404 

 Urachus, 577* 

 Urethra, 460 

 Urinary bladder, 116* 

 Urinary tubules, 113*, 114 

 Urinogenital organs, of Craniata, 113, 



114, 115, 116, 117 : Petromyzon, 130, 

 131: Myxinoids, 137 : Dogfish, 15S. 

 159, 160, 161 : Elasmobranchii, 174, 

 175 : Holocephali, 189, 190 : Trout, 

 208, 309 : Teleostomi, 231, 232, 233 : 

 Ceratodus, 247, 248 : Frog, 278, 279 : 

 Amphibia, 299, 300: Lizard, 322, 

 323 : Reptilia, 351 : Pigeon, 394, 

 395 : Aves, 422 : Rabbit, 459. 460, 

 461 : Mammalia, 564-567 



Urinogenital organs, development of, 



115, 116 

 Urochord, 2:5* 



Urochorda, 13* : Example, 14 : Dis- 

 tinctive characters and classifica- 

 tion, 20 : Systematic position of 

 Example, 23 : General features, 23 : 

 Enteric canal, 28 : Heart, 28 : 

 Nervous system and sense organs, 

 28-30 : Renal organ, 30 : Repro- 

 ductive system, 30 : Development 

 and metamorphosis, 30-40 : Dis- 

 tribution, &c., 40, 41 : Affinities, 41, 

 42 



Urodseum, 384, 385* 



Urodela, 284*, 285, 287, 288, 289, 290, 

 291, 293, 294, 295, 296, 298, 299, 

 300, 302 



Uro-hyal, 201 



Urolophus cruciatus, 166 



Urolophus testaceus, 169 



Uropygium, 367* 



Urostyle, of Salmo, 196 : Frog, 258, 

 259 : Amphibia, 289 



Ursidce, 470, 529, 530, 551 See Bears 



Ursus, 552 



Ursus americanus, 530 



