778 



INDEX 



ax, 220 

 u* ln.ckt'i, 559 

 Trichina, 284, 288 

 Trichocyst, 80, 84 

 Trichoplax, 220 

 Trichostomata, 82 



Tricladida, 237% 241, 248, 251, 252, 

 255 



660 



Trigger-hair See Cnidocil 



Trigonia, 646, 652, 661 



TriloMta, 558, 559, 629 



Trimorphism, 119* 



TRITON XODIFERUS, 671 : Shell, 672, 673 : 

 External features of soft parts, 674 : 

 Foot, 675 : Visceral spirals, 675 : Man- 

 tle, 675: Ctenidium, 676: Osphradium, 

 676 : Digestive system, 676 : Vascular 

 system, 679 : Excretory system, 679 : 

 Nervous system, 679, 680 : Sensory 

 organs, 682 : Reproductive organs, 682 : 

 Systematic position, 685 



Tritontdce, 685 



Trivium, 348* 



Trochelmintlies, 221, 298 



Trorheta, 476 



Trochophore See Trochosphere 



Tro-hotphwra, 304, 306, 307 



Trochosphserida, 304*, 307 



Trochosphere, 298 



Twhnx, 683, 696 



Trombidium fuliyinos n m, 616 



Tube-feet, 348*, 363, 383 



Tubiftx, 442 



TubificidcK, 434, 447 



T-uhipora, 186, 190, 195 



Tnbti/trrM, 133, 135 



Turbellaria, 237*, 239, 240, 248, 250, 

 251, 252, 253, 255, 263, 264, 266, 

 267 



Turf >o. 683, 696 



Typhlosole, 421*, 436 



u 



U: 



MBO, 634" 

 Umbrella, 124*, 156 

 Undulating membrane, 83* 

 Unicellular, 18* 

 Unicellular gland, 22"" 

 Unio, 631, 647 See Anodonta 

 Unto iii r<irit iftr, 631 

 Unionida', 647 

 Unisexual, 38* 

 Urea, 35 

 Uric acid, 34 

 Urinary organs, 35* 

 UmatfOa, 326 

 Uropod, 500" 

 Uterus, 38* 



ACUOLE, contractile, 11*, 79 



Variation, individual, 2*, 104* 



Variety, 2*, 105* 



Vascular system, 32 : Nemertinea, 270 : 

 Acanthocephala, 291 : Phoronix, 329 : 

 M't'l'/f'tnia, 336: Brachiopoda, 340: 

 Starfish, 351, 355 : Holothurian, 370 : 

 A ntedou, 376 : Echinodermata, 394 : 

 Nereis, 409 : Lumbricus, 421 : Sipnii- - 

 culii*, 452 : Gephyrea, 457 : Archi- 

 annelida, 464: Hirudo, 471, 472: 

 Hirudinea, 477 : A pus, 491 : A$t.acu>s\~ 

 509, 512: Crustacea, 550: Ptripafii*, 

 561 : Periplaneta, 577 : Insects, 594 : 

 Seorpion,Qffl : Arachnida, 619 : J/*W, 

 640, 641 : Pelecypoda, 656 : Amphi- 

 neura, 666 : Triton, 679 : Gastropoda, 

 (593: Scaphopocla, 706: Sepia, 714, 

 719 : yantilnx, 732, 733 : Cephalopoda, 

 743 



Vas deferens See Spermiduct 



Vaso-peritoneal vesicle, 396 



Velarium, 167* 



Vtltlla, 154 



Veliger, 659*, 703*, 704 



Velum, 125*, 126, 659*, 701 



Ventral, 41* 



Ventricle, 34* 



Venn* < i u i<l in, 650 



Venus' s Flower-basket, 112 



Venus's Girdle, 210 



Vermes, 221 



Verjiietes, 684 



Vermilia, 430 



Vibracula, 321, 324* 



Virgula, 155* 



Visceral spiral, of Triton, 675 



Vitelline glands See Yolk-glands 



Viviparous, 38* 



Valuta, 699 



Volvox, 67, 68, 70, 71 



Vortex, 240 



Vorticdla; 83, 84, 86.87, 88, 89 



Vulsella, 649; 653 * 



W 



Magellania 

 Wandering cells, 102 

 Wasps, 587 

 Water-bugs, 585 

 Water-flea, 522 

 Water-pores, 375*, 393 

 Water-tubes, 37">' s , 393 

 Water-vascula ~iem, 222 

 Whale-louse, { 

 Wheel-aninm 1 See Kotifera 



