644 INDEX 



Trilobite stage of Xiphosura, 457 



Triploblastic animals, i ; 1 26 



Triploblastica, see Triploblastic ani- 

 mals 



Tripylaea, 71 



Tritocerebrum, 274, 305 



Triungulin, 430 



Trochal disc, 211 



Trochanter, 385 



Trochocystis, 582 



Trochodiscus lotigispinus, 75 



Trochosphere larva, 250; i, 2; of 

 Mollusca, 472, 507 ; of Polychaeta, 

 230, 247, 250 ; of Polyzoa, 532, 534 



Trochostoma, 577 ; 576 



Trochus, 211 



Trochus, 478 



Trophallaxis, 434 



Trophi, 212 



Trophochromatin, 22 



Trophozoite, 83 



Trunk, 271 ; of Arthropoda, 271 ; of 

 Crustacea*, 291, 294, 296, 297, 

 322, 325; of Trilobita, 287 



"Trunk" of ascidian tadpole, 597 



Trunk ganglion, 597 



Trunk limbs, of Crustacea*, 290, 291, 

 293, 298, 317, 318, 324, 325, 328, 

 329, 331; of Onychophora, 283. 

 See also Abdominal limbs, Thora- 

 cic limbs 



Trunk segments of Polychaeta, 23 1 



Trypanosoma, 58 



T. brucei, 57 



T. cruzif 59 



T. equiperdum, 59 



T. gambiense, 59 



T. lewisi, 59 



T. rhodesiense, 59 



Trypanosomidae, 56 



Trypanosyllis, 246 



T. gemmipara, 245 



Tryphaena pronuba, 428, 433 



Tube feet (Podia), 546 ; 550, 563, 564, 

 566, 571, 573, 579 



Tubifex, 259 ; 260 



Tubipora, 162; 163 



Tubularia, 137; 133, 138, 139, 145 



Tunicata, 590; 584 



Turbellaria, 188; 172, 173, 174 



Tylenchus devastatrix, 2,2.^ 



T. dispaYy 225 



T. tritici, 225 



Tympana, 411 



Typhlosole, 254 

 Tyroglyphus, 462 

 T. siro, 463 



Umbo of Brachiopoda, 537 



Umbrella of trochosphere, 250 



Umbrellar surfaces, etc., of Medusae, 

 see Exumbrellar, Subumbrel,lar 



Uncini, 237 



Uncoiling of Gasteropoda, 529 



Undulating membranes, of ciliates, 

 14,97,102; of flagellates, 13,58, 61 



Uniramous limbs of Crustacea, 301 



Urochorda, see Tunicata 



Uropods,348; 353,355,356,362,373 



Urosome, 333 



Uterus, of Cestoda, 186, 199; of 

 Chirocephalus, 321 ; of Cyclops, 

 334 ; of Paliidina, 492 ; of Platyhel- 

 minthes, 186; oi Rhabditis,2iS; of 

 Rhabdocoelida, 186; of Scorpion- 

 idea, 452; of Trematoda, 186 



Vacuolaria, 48 



Vacuoles, 8; Contractile, 16, 17, 43, 

 46, 64, 75, 78, 81, ICO, 104; Food, 

 15, 60; Gas, 68; Hydrostatic, of 

 ectoplasm, 35,71, 75, 78 ; of Dino- 

 flagellata, 48 



Vagina, see Generative organs 



Vahlkampfia, 64 



Valves of shell, of Brachiopoda, 537 ; 

 of Conchostraca, 317; of Lamelli- 

 branchiata, 472, 509, 510, 511; of 

 Lepas, 339 



Vanadis, 243 



Vas deferens, see Generative organs 



Vasa efferentia, of Insecta, 397; of 

 Platyhelminthes, 185 



Vascular system, 122; of Anostraca, 

 311; of Araneida, 458 ; of Arthro- 

 poda, 279 ; of Balanoglossus, 587 ; 

 of Carcinus, 370; of Chaetopoda, 

 230; of Chilopoda, 378; of Ciona, 

 596; of Crustacea, 311 ; of Diplo- 

 poda, 381; of Insecta, 390; of 

 Lamellibranchiata, 505 ; of Lernan- 

 thropus, 314; of Limulus, 457; of 

 Malacostraca, 312; of Nemertea, 

 205, 207; of Scorpionidea, 450 



"Vascular" system of Echinoder- 

 mata, see Lacunar system 



"Vascular" system of Scyphomedu- 

 sae, 152 



