INDEX. 



1027 



Page. 



Obliqua (Hyria) Psetel 871 



Obliqua (Margarita) Lea 788 



Obliqua (Quadrula) Lamarck 7SS 



Obliqua (Unio) Wood 790 



Obliquaria Rafinesque . . . 506, 510, 514, 610, 772, 791 



Obliquata (Obliquaria) Rafinesque 7-1-1 



Obliquatus (Unio) Say 520 



Obliquiradiatus (Unio) Reeve 536 



Obliquus (Margaron) Lea 788 



Obliquus (Prisodon) Schiimacher 868, cS7J 



Obliquus (Unio) Conrad 793 



Obliquus (Unio) Hanley 788 



Obliquus (Unio) Potiez and Miehaux 523 



Oblita ( Anodonta) Lea 660 



Oblita (Margaron) Lea 660 



Oblonga ( Anodonta) Millet 623 



Oblongata (Mya) "Wood 536 



Oblongus (Unio) Lea 726 



Obnubilus (Margaron) Lea 716 



Obnubilus (Unio) Lea 716 



Obovalis (Obovaria) Rafinesque 599,744 



Obovalis Simpson SiO 



Obovalis ( Unio) Conrad ., 789 



Obovalis (Unio) Say 793 



Obovaria Rafinesque 506, 510, 514, 599 



■ Obovata (Mya) Solander 744 



Obseurus (Lampsilis) Lea 5i,9, 550 



Obseurus ( Margarita ) Lea 550 



Obseurus ( Margaron ) Lea 550 



Obseurus (Unio) Lea 549 



Obtusa ( Anodon) Heude 638 



Obtusa (Anodonta) Heude 639 



Obtusa (Cameronia) Bourguignat 910 



Obtusa (Margarita) Lea 931 



Obtusa (Margaron) Lea 931 



Obtusa (Unio) d'Orbigny 882 



Obtusata (Anodon) Heude 639 



Obtusula (Anodonta) Hupe 921 



Obtusula (Glabaris) von Ihering 921 



Obtusula (Margaron) Lea 921 



Obtusus (Anodon) Spix 931 



Obtusus-(Diplodon) d'Orbigny 882 



Obtusus (Glabaris) Spix 9S1 



Obtusus (Margaron ) Lea 537 



Obtusus ( Unio) Lea 537 



Obtusus var. b. lituratum (Anodon) Spix . 931 



Obuncus (Unio) Lea 747 



Occata (Nodularia) Lea siS 



Occatus (Unio) Lea 813 



Occidens (Margarita ) Lea 527 



Occidens ( Margaron) Lea 527 



Occidens (Unio) Lea 527 



Occidentalis (Barbala) Psetel 584 



Occidentalis (Dipsas) Heude 584 



Occidentalis (Lampsilis) Conrad 551 



Occidentalis ( Margaron ) Lea 551 



Occidentalis (Mycetopoda) Clessin 9S/, 



Occidentalis ( Unio) Conrad 551 



Occultus (Margaron) Lea 717 



Occultus (Unio) Lea 717 



Ochracea (Margarita) Lea 531 



Ochracea (Mya) Eaton 530 



Ochracea (Symphynota) Lea 531 



Ochraceus (Lampsilis) Say 530 



Ochraceus ( Margaron ) Lea 530 



Ochraceus (Unio) Say 529,530 



Ocmulgeensis (Margaron) Lea 727 



Oemulgeensis (Unio) Lea 727 



Odatelia Rafinesque 654 



Ogeecheensis (Lampsilis) Conrad 550 



Ogeecheensis (Unio) Conrad 550 



Ohioensis (Anodonta) Rafinesque 648 



Ohioensis (Metaptera) Conrad 574 



Ohioensis (Symphynota) Ferussac 574 



Ohioensis (Unio) Say 574 



Oleivora (Solenaia)Heude 656 



Oleivorus (Mycetopus) Heude 656 



Olivaria (Amblema) Rafinesque 744 



Olivaria (Nodularia) Lea S16,817 



Olivarius (Margarita) Lea 817 



Olivarius (Unio) Conrad 602 



Olivarius (Unio) Lea 817 



Omiensis (Nodularia) von Heimburg SIO 



Omiensis (Unio) von Heimburg 810 



Opaca (.\nodonta) Lea 61,5 



Opaca (Margaron) Lea 645 



Opaeatus (Unio) Crosse and Fischer 712 



Opacus (Margaron) Lea 717 



Opacus (Unio) Lea 716 



Opalina (Anodon) Anthony 644 



Opalina (Anodonta) Kuster 625 



Opalinus (Unio) Anthony 552 



Opperti (Gabillotia) Bourguignat 650 



Opperti (Margaritana) Psetel 650 



Opperti (Pseudodon) Westerlund 650 



Opperti (Unio) Bourguignat 650 



Oratus (Unio) Conrad 529 



Orbicularis (Anodon) Heude C38 



Orbicularis (Monocondylfea) Psetel 835 



Orbicularis (Monocondylus) Morelet 835 



Orbicularis (Pseudodon) Morelet S35 



Orbiculatus (Lampsilis) Hildreth 51,0 



Orbiculatus (Margarita) Lea 540 



Orbiculatus ( Margaron) Lea 540 



Orbiculatus (Unio) Hildreth 540, 600 



Orbignyana (Unio) Hupe 866 



Orbignyi (Castalina) Hupe and Deville . 866 



Orbignyi (Margaron) Lea... 866 



Orbignyi (Unio) Hupe 885 



Orbignj-i (Unio) Hupd and Deville 866 



Oregonensis (Anodonta) Lea 628 



Oregonensis (Margarita) Lea 628 



Oregonensis (Margaron) Lea 594, 628 



Oregonensis (Nephronaias) Lea 59lf 



Oregonensis (Unio) Lea 594 



Oriens (Unio) Lea 655 



Oriens (Unio) Sowerby 544 



Orien talis (Margaron ) Lea 820 



Orientalis (Nodularia) Lea 819 



Orientalis (Unio) Bourguignat. 694 



Orientalis (Unio) Lea 819 



Ornata (Pleurobema) Lea 7/t9 



Ornatus (Margaron) Lea 749 



Ornatus (Unio) Lea 749 



Ornatus (Unio) Sowerby 528 



Orontesensis (Margaron) Lea 695 



Orontesensis ( Unio) Lea 695 



Orphaensis (Margaron) Lea 695 



Orphaensis (Unio) Lea 695 



Orthonymus Agassiz 765 



Ortonii (Prisodon) Lea 872 



Ortonii (Unio) Lea 872 



