INDEX 



i in:, 



Toads, 520 

 Tobacco worm, 433 

 Tocogony, 128 

 Tokophrya, 198 

 Tomato worm, 433 

 Tongue bone, 460 

 Tooth-shells, 325 

 Top-shells, 333 

 Tornaria, 449 

 Torpedo, 507 

 Tortoise, 527 

 Tortricida?, 432 

 Toucans, 544 

 Toxiglossa, 334 

 Toxodontia, 570 

 Toxopneustes, 305 

 Trabecuke, 456 

 Trachea, 482 



Tracheae, 98, 387, 401, 411 

 Tracheal gills, 402, 411 

 Tracheata, 359 

 Trachoma, 191 

 Trachydermon, 316 

 Trachymedusae, 218 

 Trachynema, 218 

 Tractus olfactorius, 469 

 Trap-door spider, 396 

 Tree cricket, 421 

 Tree hoppers, 428 

 Tree toads, 520 

 Trematoda, 242 

 Trepang, 308 

 Triarthrus, 364 

 Triaxonia, 205 

 Trichechus, 565 

 Trichina, 267 

 Trichocephalus, 267 

 Trichocysts, 192 

 Trichodectes, 420 

 Trichomonas, 184 

 Trichoplax, 200 

 Trichoptera, 422 

 Trichotrachelida?, 267 

 Tricladidea, 242 

 Triconodont, 554 

 Tridacna, 324 

 Trigeminal nerve, 471 

 Trilobita;, 363 

 Trimera, 424 

 Trionychia, 527 

 Tristicta, 396 

 Tristoma, 244 

 Tritocerebrum, 405 

 Triton embryo, 31 

 Tritoniidoe, 335 



Tritubercular, 554 

 Tritylodon, 559 

 Trivium, 292, 296 

 Trochal disc, _> y 

 Trochanter, 405 

 Trochilus, 544 

 Trochlearis nerve, 471 

 Trochophore, 238, 273 

 Trochosa, 396 

 Trochus, 333 

 Troctes, 420 

 Troglodytes, 574 

 Trombidiida?, 397 

 Trophi, 260 

 Tropic birds, 543 

 Tropidonotus, 521, 531 

 Trout, 510 

 Trygonidae, 507 

 Trypanosoma, 184 

 Trypsin, 96 

 Tubicola, 277 

 Tubicinella, 371 

 Tubificidae, 279 

 Tubinares, 543 

 Tubiporidas, 230 

 Tubitelariae, 396 

 Tubular glands, 68 



nervous system, 114 

 Tubularia, 217 

 Tubulipora, 287 

 Tunic, 442 

 Tunicata, 441 

 Turbellaria, 240 

 Turbinal bones, 475, 548 

 Turbinidaa, 333 

 Turdus, 544 

 Turkey buzzard, 544 

 Turkeys, 543 

 Turritopsis, 217 

 Turtles, 526 

 'Twixt brain, 469 

 Tylenchus, 266 

 Tylopoda, 569 

 Tympanal organs, 117, 



410 



Tympanum, 479 

 Tympanic annulus, 479 



bone, 462, 548 



membrane, 471; 

 Typhline, 530 

 Typhlotriton, 520 

 Typhlomolge, 520 

 Typhlops, 531 

 Typhoid, 431 

 Typhus, recurrent, 184 



Tyrian purple, 334 

 Tyrannidiu, 544 



Uca, 382 



Uintatherium, 570 



Ulmaris, 223 



Ulna, 465 



Ulnare, 465 



Umbilicus, 326, 490 



Umbo, 317 



Umbrella, 211 



Uncinate processes, 535 



Unguis, 450, 546 



Ungula, 450, 546 



Ungulata, 566 



Unguligrade, 550 



Unio, 324 



Unipolar cells, 84 



Ureter, 107, 488 



Urinator, 543 



Urinary bladder, 105, 490, 



54 



Urnatella, 285 

 Urochorda, 441 

 Urodela, 519 

 Urogenital sinus, 489, 555 



system, 109 

 Urosalpinx, 334 

 Ursus, 565 

 Use and disuse, 16, 47 



effects of, 89 

 Uterus, 109, 557 

 Utriculus, 117, 478 

 Uvula, 554 



Vagabundae, 396 

 Vagina, 557 

 Vagus nerve, 471 

 Valkeria, 287 

 Vampyre, 565 

 Vanessa, 433 

 Varanus, 524, 530 

 Variations, fluctuating, 44 

 Variola, 191 



Vasa deferentia, 109, 486 

 Vascula, 99 

 Vater-Pacinian corpuscles, 



"5. 474 

 Vegetative organs, 90, 91 



pole, 133, 142 

 Veins, 101 

 Velella, 220 

 Veliger, 3I4 

 Velum, 211, 314, 440 

 Veneridos, 324 



