7.02 



INDEX. 



Triton, sections of embryo, 39 



Tritonidse, 382 



Tritubercular teeth, 626 



Tritylodon, 632 



Trivium, 334 



Trochal disc, 293 



Troc banter, 463 



Trochidse, 379 



Trochilida;, 616 



Trochilus, 616 



Trochlear nerve, 536 



Trochophore, 306 



Trochosa, 453 



Trochus, 379 



Troctes, 479 



Troglodytidse, 616 



Troglodytes, 651 



Trombididae, 454 



Trophi, 294 



Tropic birds, 615 



Tropidonotus, 601 



Trout, 576 



Trunk fish, 578 



Trutta, tail of, 41 



Trygonidae, 572 



Tubicola, 313 



Tubificidae, 315 



Tubinares, 615 



Tubifex, 315 



Tubiporidse, 259 



Tubitelariae, 453 



Tubular glands, 77 



Tubular nervous system, 124 



Tubulariae, 239, 241, 242 



Tubulipora, 324 



Tunic, 505 



Tunicata, 505 



Turbellaria, 268 



Turbinated bone, 620 



Turbinidse, 379 



Turbo, 379 



Turbot, 578 



Turbidse, 616 



Turd us, 616 



Turkey, 614 



Turkey buzzard, 617 



Turritopsis. 240, 242 



Turtles, 594 



Twixt brain, 534 

 Tylenchus, 300 

 Tylopoda, 643 

 Tympanal organ, 128, 468 

 Tympanic annulus, 544 

 Tympanic bone, 526 

 Tympanic cavity, 621 

 Tympanic membrane, 544 

 Tympanum, 544 

 Type theory, 15 

 Typhline, 599 

 Typhlops, 60 1 

 Tyrian purple, 380 

 Tyrannidae, 616 



Uca, 437 



Uintatherium, 643 



Ulmaris, 247 



Ulna, 529 



Ulnare, 529 



Umbilicus, 370, 554 



Umbo, 358 



Umbrella, 234 



Uncinate process, 605 



Ungues, 618 



Ungulae, 618 



Ungulata, 639 



Unguligrade, 640 



Unicellular glands, 77 



Unicorn, 646 



Unio, 367 



Unionidae, 367 



Ureter, 550 



Urinary bladder, 552 



Urinator, 615 



Urinatores, 615 



Urnatella, 322 



Uroceridse, 486 



Urochorda, 505 



Urodela, 587 



Urogenital sinus, 553 



Urogenital system, 120 



Urogenital system of vertebrates, 550 



Urosalpinx, 379, 380 



Ursidse, 647 



Ursus, 647" 



Use and Disuse, 55, 99 



Uterus, 120, 629 



