970 



INDEX 



Triconodon, 832. 



Trigeminal, 545. 



Triglidae, 641. 



Trilobites, 429, 430, 431. 



Triploblastic, 153, 21c. 



Tristomum, 222. 



Triton, 678, 678. 



Tritubercular, 816. 



Tritylodon, 837. 



Trivium, 292. 



Trochanter, 795. 



Trochlear ner\-e, 545. 



Trochoceras, 485. 



Trochosphere, 244, 263, 435, 469- 



Trombidium, 423. 



Trophoblast, 822. 



Trophospongia, 825. 



Trophozoite, 126. 



Tropidonotus, 707, 709. 



Trout, 641. 



Tn^panosoma gambiense,. 148. 



Tr\'panosomes, disease-producing, 147 



410,4x1. 

 Trypanosomidae, 147. 

 Trvpsin, 30. 



Tsetse fly, 145, i47, 4io. 

 Tuatara, 684. 

 Tube-feet of brittle-star, 299. 



— of sea-urchin, 301, 304. 



— of starfish, 295. 

 Tubercle of rib, 789. 

 Tubifex, 228, 266. 

 Tubipora, 195, 205. 

 Tubularia, 181, 204. 

 Tunic of Tunicata, 501. 

 Tunicata, 6, 61, 499, 573- 



— classification of, 513. 



— general notes on, 507. 



— relations of Amphioxus and, 528. 



— relationships of, 514. 

 Tunicin, 500. 

 Tupaia, 874, 876. 

 Turbellaria, 11, 212. 



— classification of, 214. 

 Turbellarian, diagram of, 213. 

 Turrilites, 485. 



Turtles, 686, 687. 

 Turtonia, 476. 

 Tylenchu?, 239, 241. 

 Tvlopoda, 848, 849. 

 Tympanic bulla, 790, 793, 871. 

 Tympanum, 550. 

 Typhlopidae, 709. 

 Tvpblosole, 250. 

 Tyroglyphus, 423- 



Uintatherium, 860. 

 Ulna, 537. 

 Umbilical cord, 822. 



— vesicle, 821, 822. 

 Umbilicus of embryo, 768. 



— of feather, 734. 

 Umbo, 446. 

 Umbrella, 474. 



Uncinate processes, 710, 740. 

 Ungxilata, 847, 860. 



Unio, 446, 447, 448. 



Unionicola, 453. 



Ureter, 809. 



Urethra, 811. 



Urinogenital organs of pigeon, 755. 



of rabbit, 810. 



— system of Vertebrates, 567. 

 Urochorda, 7, 499. 

 Urodela, 677, 682. 

 Uronemus, 642. 



Urostyle, 631. 

 Ursidae, 873. 

 Ursus, 873. 

 Uterus, 812. 



— masculinus, 811. 

 Utriculus of ear, 548. 



Vacuoles, 52. 



— contractile, 112, 136. 



— food. III. 

 Vagina, 812. 

 Vagus nerve, 545. 

 V'alves of veins, 561. 

 Vampire bat, 880. 

 Vampyrella, 137. 

 Vamp\TUS, 880. 

 Varanid, skull of a, 695. 

 Varanida?, 703. 

 Variation, 62, 187, 909. 



Variations due to changes in germ ceUs, 



911. 

 Vas deferens, 568. 

 Vascular system of Amphioxus, 323. 



of Anodonta, 451. 



of Arenicola, 260. 



— - — of Ascidian, 505. 



of Balanoglossus, 493. 



of bee, 382. 



of Chelonia, 689. 



of cockroach, 375- 



of crayfish, 330. 



of Crinoid, 312. 



of Crocodilia, 713. 



of Dipnoi, 647. 



of dogfish, 613. 



of earthworm. 250. 



of frog, 662, 663, 664. 



of haddock, 623. 



of Helix, 441. 



of Hirudo, 276. 



of Insects, 392. 



of Lizards, 699. 



of Mammalia, 780. 



• — — ^ of Myxine, 578. 



of Nemerteans, 234. 



of Peripatue, 363. 



of Petromyzon, 582. 



of pigeon, 748, 750, 751. 



of rabbit. 803, 804. 



of scorpion, 414. 



of sea-urchin, 303. 



of Sepia, 462. 



of skate. 603. 



of spider, 419. 



of starfish, 296. 



of Vertebrates, 560. 



