724 



INDEX 



Trichosphaerium, 74; 72 



Tricladida, 214; 211 



Trilobita, 323 



Trilobite stage of Xiphosura, 529 



Triploblastic animals (Triploblas- 

 tica), I ; 129, 136 



Tripylaea, 80 



Tritocerebrum, 310, 340 



Triungulin, 492 



Trochal disc, 239 



Trochanter, 428 



Trochocystis, 658 



Trochodiscus longispinus, 80 



Trochosphere larva, 282; i, 2, 145, 

 618; of Annelida, i ; of Mollusca, 

 I. 547, 582; of Polychaeta, 263, 

 281, 282; oi Polygordius, 284, 294; 

 of Polyzoa, 2, 609, 610 



Trochostoma, 652 ; 653 



Trochus, 239 



Trochus, 552 



Trophallaxis, 498 



Trophi, 240 



Trophoch'romatin, 26 



Trophozoite, 88 



Trunk, of Arthropoda, 308 ; of 

 Crustacea*, 308, 327, 330, 331, 

 333, 360, 364: of Trilobita, 323. 

 See also Abdomen, Thorax 



"Trunk" of ascidian tadpole, 675 



"Trunk" ganglion, 676 



Trunk limbs, of Crustacea*, 326, 

 327, 329-30, 362, 363, 364, 368, 

 370; of Onychophora, 319. See 

 also Abdominal limbs, Thoracic 

 limbs 



Trunk segments of Polychaeta, 265. 

 See also Abdomen, Thorax 



Trypanosoma, 64 ; brucei, 62, 65 ; 

 cruzi, 64; eqidperdum, 64; gam- 

 biense, 64 ; lewisi, 64 ; rhodesiense, 64 



Trypanosomidae, 63 



Trypanosyllis, 280 ; gemmipara, 279 



Tryphaena pronuha, 491 ; 488, 497 



Tube feet (Podia), 623; 625, 627, 

 630, 638, 639, 641, 643, 647, 648, 

 649, 650, 655 



Tubifex, 293 



Tubipora, 185 



Tubularia, 158; 154, 159, 160, 162 



Tunicata, 669; 661 



Turbellaria, 213; 197, 198 



Tylenchus devastatrix, 253 ; dispar, 

 256; tritici, 253 



Tympana, 468 

 Typhlosole, 287 

 Tyroglyphus, 534; siro, 535 



Umbo of Brachiopoda, 613 

 Umbrella of trochosphere, 282 

 Umbrellar surfaces, etc., of Medusae, 



see Exumbrellar, Subumbrellar 

 UncJni, 270 



Uncoiling of Cephalopoda, 605 

 Undulating membranes, of ciliates, 



17, 104, 109; of flagellates, 17, 64, 



66 

 Uniramous limbs of Crustacea, 338 

 Urochorda, see Tunicata 

 Uropods, 388; 395, 397, 398, 407, 



415 



Urosome, 372 



Uterus, of Cestoda, 211, 225, 228, 

 232; of Chirocephalus, 359; of 

 Cyclops, 373 ; of Paludina, 566; of 

 Platyhelminthes, 211; of Rhab- 

 ditis, 250; of Rhabdocoelida, 211 ; 

 of Scorpionidea, 524; of Trema- 

 toda, 211, 230 



Vacuolaria, 54 



Vacuoles, 12; Contractile, 20, 21, 49, 

 52, 69, 70, 80, 83, 86, 107, hi; 

 Food, 19, 20, 65; Gas, 72, 74; 

 Hydrostatic, of ectoplasm, 40, 76, 

 80, 83 ; of Dinoflagellata, 54 



Vagina, see Generative organs 



Vahlkampfia, 69 



Valves of shell, of Brachiopoda, 613, 

 615 ; of Conchostraca, 333, 354; of 

 Lamellibranchiata, 545, 585, 586; 

 of Lepas, 379; of Ostracoda, 333, 

 368 



Vanadis, 276 



Vas deferens, see Generative organs 



Vasa efferentia, of Insecta, 447 ; of 

 Platyhelminthes, 210 



Vascular system, 132; of Anostraca, 

 348; of Araneida, 530; of Arthro- 

 poda, 314; of Balanoglossus, 664, 

 666; 665; of Carcinus, 414; of 

 Chaetopoda, 263, 273; of Ciona, 

 674 ; of Crustacea, 348 ; of Insecta, 

 437 ; of Lamellibranchiata, 579 ; of 

 Lernanthropus, 349-5 1 ; of Limulus, 

 529; of Malacostraca, 348-9; of 

 Myriapoda*, 421, 424; of Nemer- 

 tea, 233, 235 ; of Scorpionidea, 522 



