534 



MOLLUSCA BRACHIOPODA 



Troclioiomi , 266, 407 



Trochus, 263, 40 S ; eye, 182; stomach, 



239 

 Trophon, 423 



Tropical beach, Mollusca of a, 3 

 Troj) idoph or a, 4^4 

 Tropites, 397 

 Troschelia, 4"4 

 Truncaria, 433 

 Truncatella, 260, 414 

 Tryblidium, 405 

 Trypanostoma, 340 

 Tryi^ho of Lanijisacus, prayer against snails, 



121 

 Tubed operculates, 157, 266, 300, 307, 



309 

 Tudicla, 4^4 



Tudora, 291, 349, 351, 414 

 Tugonia, 4^6 

 Tidotoma, 340, 4IG 

 Turhinella, 100, 262, 264, 424, 4:24 

 Turbo, 409 ; eye, 182 ; osphradium, 195 ; 



operculum, 268 

 Turhonilla, 250, 332, 4"2 

 Turcica, 4O8 



TiiiTicula, 425 ; radula, 221 

 Turrilites, 399, 399 

 Turritella, 252, 417; radula, 215, 224 

 Tyleria, 459 

 Tylodina, 431 

 Tylopoma, 4I6 

 Tympanotonus, 4IG 

 Tyndaria, 447 

 Typhis, 4~23 



Ultra-dextral shells, 250 



Umhonella, 409 



Umbonium, 409 



Umbrella, 10, 431 ; radula, 217, 230 



Uncites, 505 ; stratigraphical distribution, 



507, 508 

 Underground snails, 48 

 Ungidina, 452 

 Unicardium, 452 

 Unio, 452 ; shell, 254, 259, 273, 341 ; 



variation, 92 

 Union of Liinax, 128 

 Unionidae, origin of, 15 ; eaten by rats, 



57 ; larvae, 146 

 Urocyclus, 331, 440 

 Urosalpinx, 423 

 Utricidus, 430 

 Uvanilla, 409 



Vagixula, 245, 319, 343, 352, 44S 

 Vaginulidae, radula, 234 ; anus, 241 

 Valletia, 456 

 Vallonia, 441 



Valvata, 133, 4I6 ; branchia, 159 

 Valves of Cliitonidae, 401 f. 

 Vanganella, 454 

 Variation, 82 f. 



Varicella, 346, 348 



Velalea, 260, 4IO 



Vellfcra, 353, 44O 



Veliger stage, 131 ; mistaken for perfect 



form, 133 

 Velorita, 302, 453 

 Velum, 131 



Velutina, 275, 4II ; radula, 223 

 Veneracea, 454 

 Venericardia, 451 

 Venerupiis, 454 

 Veniella, 451 

 Venilicardia, 451 

 Venus, 270, 271, 446, 454 '■, U. vierccnaria, 



97, 374 

 Vcrania, 391 



Vermetus, 2i7, 4IS; radula, 223 

 Veronicella, 443 

 Verticordia, 458 



Vertigo, 327, 44'^ ; T'. arctica, 287 

 Vex ilia, 423 

 Vibex, 4i7 

 Vitrella, 289 

 Vitrina, 22, 296 f., 332, 440 ; hardy 



habits, 24 ; jumping jjowers, 65 ; shell, 



175 ; radula, 217 

 Vitrinella, 4O8 

 Vitriniconus, 314, 440 

 Vitrinoidea, 314, 440 

 Vitrinozonites, 340, 440 

 Vitularia, 4^3 

 ViviiMra, 324, 343, 4I6 

 Volume of water, effect in producing 



variation, 94 

 Voluta, 267, 425, 4^5 ; spawn, 125 ; radula, 



217, 221 ; distriljution, 370 ; prices 



given for rare, 122 

 Volutaxis, 348 

 Volutharpa, 267, 424 

 Volntolithes, 425 

 Volutolyria, 4^5 ; radula, 222 

 Volutomitra, 4^5 ; radula, 221 



Vnhifnjms, 423 

 Vnlrnri<i,, 429 

 VolvuteUa, 430 

 Vnlruht, 4311 

 Vidsella, 75, 446, 449 



Waldheimia, 464, 467, 468, 473, 474, 

 487 ; size, 484 ; distribution, 486 ; fossil, 

 500, 501, 502, 506, 508 



Walton and mussel cultivation, 115 



Wampum, 97 



Warner, K., quoted, 37 



W^arning coloration, 71 f. 



West Coast, South America, melanism of 

 shells occurring on, 85 



Whelks, use of, 118 



Whitncya, 424 



Whitstable, oyster-parks at, 106, 112 



Willem, v., on vision of Mollusca, 185 



Wollaston, T. V., quoted, 32 



