1042 



INDEX. 



Page. 



Tryonii ( Anodonta) Lea 632 



Tryonii (Margaron) Lea 632 



Tuberculata (Cristaria) Schumacher 584 



Tuberculata (Mya) Eaton 608 



Tuberculata obesa (Tritogonia) Simpson. 609 



Tuberculata (Obllquaria) Raflnesque 794,795 



Tuberculata (Quadrula) Raflnesque 794,795 



Tuberculata (Rotundaria) Agassiz 795 



Tuberculata (Tritogonia) Barnes 608 



Tubereulatus ( Margarita) Lea 608 



Tuberculatus (Margaron) Lea 608 



Tubereulatus ( Unio) Barnes 509, 608 



Tuberculatus ( Unio) Conrad 795 



Tuberculosa (Unio) Valenciennes 795 



Tuberosa (Quadrula) Lea 77i 



Tuberosus (Margaron) Lea 774 



Tuberosus (Unio) Lea 774 



Tumescens (Margaron) Lea 750 



Tumescens (Pleurobema) Lea 750 



Tumescens (Unio) Lea, 750 



Tumida ( Anodon) Heude 638 



Tumida (Anodonta) Kuster 625 



Tumida (Monocondyleea) Deshayes and 



Jullien 838 



Tumidula (Nodularia) Lea 81U 



Tumidulus ( Margaron ) Lea 814 



Tumidulus (Unio) Lea 814 



Tumidus (Margaron) Lea 685 



Tumidus (Monocondylus) Morelet 837 



Tumidus (Pseudodon) Morelet 837 



Tumidus (Unio) Retzius 513, 



530, 679, 680, 6SU, 685, 698 



Tunizana (Anodonta) Morelet 649 



Tuomeyi (Margaron) Lea 726 



Tuomeyi (Unio) Lea 7'26 



Turcicus (Unio) Kuster 700 



Turcicus (Unio) Parreyss 694 



Turgida (Castalia) Hupe 863 



Turgidulus (Margaron) Lea., 524 



Turgidulus (Unio) Lea 524 



Turgidus (Margarita) Lea 781 



Turgidus ( Margaron) Lea 781 



Turgidus (Unio) Lea 781 



Turgidus (Unio) Reeve 776 



Turtoni (Unio) Payraudeau 685, 687 



Tuscumbiensis (Unio) Lea 749 



Uber (Unio) Conrad 744, 780 



Ucayalensis (Anodonta) Philippi 928 



'Uhareensis (Margaron) Lea " 724 



LThareensis ( Unio) Lea 724 



Umbonatus (Glabaris) Simpson 926 



Umbonatus (Unio) Bourguignat 692 



Umbrans (Margaron) Lea , 549 



Umbrans ( Unio) Lea 549 



Umbrosus (Lampsills) Lea 570 



Umbrosus (Margaron) Lea 570 



Umbrosus (Unio) Lea 570 



Unadilla (Anodon) De Kay 617 



Unadilla (Strophitus) Conrad 617 



Undata (Mya) Eaton 788 



LTndatus (Unio) Barnes 788 



Undatus (Unio) Conrad 788 



Undosa (Castalia) von Martens 866 



Undosa ( Castalina) von Martens 866 



Undulata ( Alasmidonta) Say 666, 667 



Undulata (Alasmodonta) C.B.Adams ... 618 



Page. 



Undulata (Alasmodonta) Say 667 



Undulata (Anodon ) Gould 617 



Undulata (Anodonta) Hildreth 616 



Unduld,ta (Anodonta) Say 616, 618 



Undulata (Baphia) H. and A. Adams 667 



Undulata latecostata (Quadrula) Lea 769 



Undulata ( Margarita) Lea 618, 667 



Undulata (Margaritana) Kuster 667 



Undulata (Margaron) Lea 618, 667 



Undulata (Monodonta) Say 666, 667 



Undulata (Mya) Eaton 769 



Undulata (Mya) Wood 667 



Undulata pilsbryi (Quadrula) Marsh 769 



Undulata (Quadrula) Barnes 768, 769 



616 

 667 

 769 

 769 

 618 

 667 



Undulata (Unio) Deshayes 



Undulata (Unio) Hanley 



Undulatus (Margarita) Lea 



Undulatus (Margaron) Lea 



Undulatus (Strophitus) Say 



Undulatus (Strophitus) Stimpson 



Undulatus (Unio) Barnes 769, 802 



770 

 6/,! 

 601 

 601 

 601 

 547 



Undulatus (Unio) Say 



Undulifera (Anodonta) Clessin 



Unicolor (Margaron) Lea 



Unicolor (Obovaria) Lea 



Unicolor (Unio) Lea 



Unicostatus (Unio) B. H. Wright 



Unio Retzius 501,502, 



503, 506, 510, 513, 514, 518, 530, 539, 579, 593, 602, 

 674, 679, 703, 738, 740, 745, 760, 772, 791, 792, 798, 

 799, 801, 804, 845, 851, 857, 867, 877, 880, 883, 892 



Uniomerus Conrad 680, 739 



Unionidaj 501 , 502, 503, 504, 505, 507, 511, 



513, 514, 515, 516, 535, 744, 861, 863, 882, 933 



Unionince 501, 514, 516 



Uniopsis Agassiz 616 



Uniopsis ( Anodonta ) Lamarck 653 



Uniopsis (Leguminaia) Lamarck 653 



Uniopsis (Margarita) Lea 653 



Uniopsis (Margaron) Lea 653 



Uniopsis Swainson 666 



Upsoni (Unio) Marsh 539 



Uruguayensis (Anodonta) Lea 917 



Uruguayensis (Columbia) Peetel 917 



Uruguayensis (Diplodon) Lea 875, 885 



Uruguayensis (Margaron) Lea 875, 917 



Uruguayensis (Unio) Lea 875 



UsumasintEe (Quadrula) Crosse and 



Fischer 796 



Usumasintee (Unio) Crosse and Fischer .. 796 



Utriculus (Margaron) Lea 785 



Utriculus (Quadrula) Lea 785 



Utriculus (Unio) Lea 785 



Ujijiensis (Grandidieria) Bourguignat... 848 



Ujijiensis (Parreysia) Bourguignat 81,8 



Vaalensis ( Unio) Chaper 825 



Vagulus (Hyriopsis) Fischer 580 



Vagulus (Unio) Fischer 581 



Valdivanus (Unio) Philippi 881 



Valentinus (Margaron ) Lea 686 



Valentinus (Unio) Rossmassler 686 



Valentinus (Unio) Sowerby 692 



Valeus (Iridina) Jay 908 



Valida (Pleurobema) Lea 7i-9 



Validus (Unio) Lea 749 



Vallata (Quadrula) Lea 783 



