778 



INDEX 



Treptoplax, 220 

 Triarthnis !>e<-kii, 559 

 Trirhum, 284, 288 

 Trichocyst, 80, 84 

 Tric~hoplax, 220 

 Trichostomata, 82 



Tricladida, 237", 241, 248, 2.31, 252, 

 25.5 



V, 



V 



is, 660 



Trigger-hair See Cnidocil 



Triyonia, 646, 6.52, 661 



Trilobita, 558, 559, 629 



Trimorphism, 119* 



TRITON XODIFERCS, 671 : Shell, 672, 673 : 

 External features of soft parts, 674 : 

 Foot, 675 : Visceral spirals, 67-5 : Man- 

 tle, 67o: Cteuidium, 676: Osphradium, 

 676 : Digestive system, 676 : Vascular 

 system, 679 : Excretory system, 679 : 

 Nervous system, 679, 680 : Sensory 

 organs, 682 : Reproductive organs, 682 : 

 Systematic position, 68.5 



TritonidoB, 685 



Trivium, 348* 



Trochelminthes, 221, 298 



Trochtta, 476 



Trochophore See Trochosphere 



Tro"ho*jih<i-ra, 304, 306, 307 



Trochosphserida, 304", 307 



Trochosphere, 298 



Trochu*, 683, 696 



T ro rut ii> Hum fidiyinosiim, 616 



Tube-feet, 348*, 363, 383 



Tit!,! fix, 442 



Tuliticida, 434, 447 



Ttilnpora, 186, 190, 195 



Tulmlnria, 133, 135 



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

 251, 252, 2.53, 255, 263, 264, 266, 

 267 



Tnrbo. 6,83, 696 



Typhlosole, 421*, 436 



u 



MHO, 634* 

 Umbrella, 124*, 1.56 

 Undulating membrane, 83* 

 Unicellular, 18* 

 Unicellular gland, 22 

 Unio, 631, 647 See Anodonta 

 Unio margaritifer, 631 

 Union ii.l'i', 647 

 Unisexual, 38* 

 Urea, 35 

 Uric acid, 34 

 Urinary organs, 35* 

 Urnutella, 326 

 Uropod, .500 

 Uterus, 38* 



Gastropoda, 



Sepia, 714, 



Cephalopoda, 



ACTTOLE, contractile, 11*, 79 



Variation, individual, 2*, 104 



Variety, 2*, 105* 



Vascular system, 32 : Xemertinea, 270 : 

 Acanthocephala, 291 : Phoroni*, 329 : 

 Mctgellcyiiaj 336: Brachiopoda, 340: 

 Starfish, 3.51, 355: Holf>tJ,,i,-i'-ui, 370: 

 A a f '.<lon, 376: Echiiiodermata, 394: 

 Nereis, 409 : Lunibricus, 421 : Sipiui- 

 cultiH, 452 : Gephyrea, 457 : Archi- 

 annelida, 464 : Hirudo, 471, 472 : 

 Hirudinea, 477 : A pit*, 491 : Astm-m, 

 509, 512: Crustacea, 550: Ptripnin^. 

 561 : PtripJaneta, oil : Insects, 594 : 

 Scorpion, 607 : Arachnida,619: J/.W, 

 640, 641 : Pelecypoda, 656 : Amphi- 

 neura, 666 : Triton, 679 

 693 : Scaphopoda, 706 : 

 719 : Xantllnx, 732, 733 

 743 



Vas clef erens See Spermiduct 



Vaso-peritoneal vesicle, 396 



Velarium, 167* 



VeJella, 154 



Veliger, 659*, 703*, 704 



Velum, 125*, 126, 659*, 701 



Ventral, 41* 



Ventricle, 34* 



VCH ii-i < i ii i<l la, 650 



Venus' s Flower-basket, 112 



Venus' s Girdle, 210 



Vermes, 221 



Vermetes, 684 



Vermilia, 430 



Vibracula, 321, 324* 



Virgula, 155* 



Visceral spiral, of Triton, 675 



Vitelline glands See Yolk-glands 



Viviparous, 38* 



Valuta, 699 



Voh-ox, 67, 68, 70, 71 



Vorftx. 240 



Vorticefla, 83, 84, 86, 87, 88, 89 



Vulsifffi, 649, 653 



W 



r\ ALDHED1IA See Magellania 

 Wandering cells, 102 

 Wasps, 587 

 Water-bugs, 585 

 Water-flea, 522 

 Water-pores, 375*, 393 

 Water-tubes, 375*, 393 

 Water-vascular system, 222 

 Whale-louse, .524 

 Wheel-animalcules See Kotifera 



