732 



INDEX 



Troglodytes, 615. 



Troglodylidm, 591. 



Trogon, 610. 



TrombidiidcE, 380. 



Tropaa, 354. 



Trophoblast, 680. 



Trophozoite, 49, 50. 



Tropism, 35, 36. 



Trout, 443, 444, 459, 460, 475, 476. 



Truncus arteriosus, 485 (see circulatory 



system) . 

 Trypanosoma, 70. 

 Trypsin, 482. 

 Tube-feet, 191, 192, 193, 194, 197, 200, 



202, 204, 206. 

 Tubifex, 236. 

 Tubipora, 139, 140. 

 Tubularia, 128. 

 Tubulidentata, 644. 

 Tuna, 469. 



Tunicata, 386, 389-393, 691, 296, 693. 

 Tupaiidce, 650. 

 Turbellaria, 150, 155-157. 

 Turbot, 469. 

 Turdidce, 591. 

 Turkey, 590, 606, 631. 

 Turnstone, 607. 

 Turtles, 527-534; 535, 536, 540, 541, 



542, 543, 544. 57i- 

 Tympanic membrane, 478, 640. 

 Tympanuchus, 606 . 

 Typhlomolge, 511, 513, 514. 

 Typhlopida, 538 ; Typhlops, 538. 

 Typhlosole, 216, 219, 418. 

 Typhlotriton, 517. 

 TyrannidcB, 591,615,616; Tyr annus, 615. 



Uca, 302. 



Uintatherium, 686. y 



Ulna, 404. 



Ulnare, 404, 496, 497. 



Umbo, 244. 



Uncinate process, 579, 580. 



Ungalia, 539. 



Unguiculata, 632, 642. 



Ungulata, 633, 644. 



Unio, 243 (see Anodonta). 



Ureters, 407, 490 (see urinogenital 



system) . 

 Urethra, 640. 

 Urine, 639. 

 Uriniferous tubules, 491. 



Urinogenital system, of dogfish, 428; 



lamprey, 417, 419; turtle, 532, 533. 

 Urnatella, 185. 

 Urochorda, 389. 

 Urocyon, 653. 

 Urodela, 510. 

 Uroglena, 45. 

 Uropod, 278, 281. 

 Urosalpinx, 258, 260. 

 Urostyle, 493, 495. 

 Ursidce, 652, 654. 

 Ursus, 654, 655. 

 Uta, 555. 

 Uterus, 490, 492, 641 (see reproductive 



system) . 

 Uterus masculinus, 640. 

 Utriculus, 411. 



Vacuole, 13 ; contractile, 28, 29, 42, 53, 

 54 ; food, 28, 30. 



Vagina, 322, 323 (see reproductive 

 system) . 



Vampire bat, 643, 651. 



Varanida, 537 ; Varanus, 537. 



Vas deferens, 226, 227 (see reproductive 

 system). 



Vas efferens, 490, 491. 



Veins, 4S7, 485, 489 (see circulatory 

 system). 



Veliger, 271. 



Velum, 123, 271, 396, 397. 



Vena cava, 247 (see circulatory system). 



Ventricle, 406, 486 (see circulatory sys- 

 tem). 



Ventriculus, 334, 335. 



Venus, 262. 



Venus', flower basket, 103, 106; girdle, 



147. 



Vertebra, amphiccelous, 435 ; caudal, 405, 

 636 ; cervical, 405, 636 ; dorsal, 405 ; 

 lumbar, 636 ; proccelous, 495 ; sacral, 

 405, 636; thoracic, 636. 



Vertebral column, 400, 404, 493, 495 

 (see skeleton). 



Vertebrates, 24, 400-701 ; circulatory 

 system, 406 ; classes of, 400 ; digestive 

 system, 405 ; excretory system, 407 ; 

 integument, 402, 403 ; muscular sys- 

 tem, 405 ; nervous system, 408 ; plan 

 of structure, 401 ; reproductive system, 

 413; respiratory system, 407; skele- 

 ton, 403-405 ; sense organs, 410 



