2IO 



Index 



lumila (Ferrissia) Sterki 119 



Pumilum (Pleurocera) Lea 152 



Pumilum (Strephobasis) Lea 152 



Pumilus (Anculotus) Con 145 



Pumilus (Ancylus) Sterki i tg 



Pumilus (Somatogyrus) Con 145 



Pupaeformis (Goniobasis) Lea 160 



Pupoidea (Valvata) Gld 33 



Purpurea (Lithasia) Lea 150 



Pusilla (Cyclas) Gmel 200 



Pusilla (Obliquaria) Raf 175 



Pusillus (Unio) Lea 175 



Pustulata (Quadrula) Lea 168 



Pustulosa (Quadrula) Lea i58 



Pustulosa pernodosa (Quadrula) Lea .... 168 



Pygmaeus (Somatogyrus) Walk. 145 



Pyramidata (Quadrula) Lea 167, 169 



Pyrgulopsis C. and P 28, 29, 139 



Quadratus (Somatogyrus) Walk 145 



Quadrula Raf 42, 43, 44, 166, 170 



Quadrula (Obliquaria) Raf 167 



Radiata (Lampsilis) Gmel 183 



■ Radiata oneidensis (Lampsilis) Baker ... 183 



Radix Mont 6, 7 



Rafinesquei (LInio) Van 175 



Rangia Desni 88 



Rangiana (Truncilla) Lea 83 



Rangiidse 39, 88 



Rariplicata (Quadrula) Lam 168, 170 



Raveneliana (Alasmidonta) Lea 178 



Raymondi (Musculium) Coop 188 



Reclivata (Neritina) Say 38, 164 



Reclivata palmaa (Neritina) Dall 164 



Recta (Id) Rve 199 



Recta (Lampsilis) Lam 183 



Recta (Unio) Lam 77, 183 



Recta latissima (Lampsilis) Raf 184 



Recta sageri (Lampsilis) Simp 183 



Reflexa (Obliquaria) Raf 67 



Refulgens (Quadrula) Lea 169 



Retusa (Obliquaria) Raf 168 



Retusa (Obovaria) Lam 180 



Retusa (Unio) Lam 74, :68 



Rhi|..doglossa 37 



Rhodaceus (Ancylus) Hinkley 122 



Rhodacme (Rhodacmea) Walk 21, 122 



Rhodacmea Walk 21, 122 



Rhodacmeins Walk 17, 20, 122 



Rhodocephala Walk 21, 122 



Rhomboidea (Physa) Crandall 109, iii 



Rimosus (Unio) Raf 80, 185 



Riograndensis (Cochliopa) P. and F. ..31, 141 



Rivalis (Physa) M. and R 113 



Rivalis (Physa) Shy 113 



Rivicolum (Sphaerium) Leach 199 



Rivulina Clessin 200 



Rivularis (Ancylus) Say 19, 1 19 



Rivularis (Ferrissia) Say 119 



Roanense (Pleurocera) Lea 152, 153 



Roanense (Trypanostoma) Lea 153 



Robusta (lo) Lea 153 



Robusta (Pomatiopsis) Walk 748 



Romae (Goniobasis) Lea iCi 



Rorata (Melania) Rve 153 



Rosaceum (Musculium) Pme 189 



Rotundaria Raf 43, 48, 170, 171 



Rotundata (Ampullaria) Say 124 



Rotundata (Unio) Lam 71 



Rowelli (Amnicola) Tryon 31 



Rowelli (Cochliopa) Tryon 141 



Rubellus (Planorbis) Sterki 102 



Rubiginosa (Fusconaia) Lea 48 



Rubiginosa (Quadrula) Lea 169 



Rubra (Obliquaria) Raf 169 



Rudens (Goniobasis) Rve 160 



Rufescens (Goniobasis) Lea 161 



Rufum (Campeloma) Hald 127, 128 



Rufum geniculiforme (Campeloma) Pils. . 129 



Rufum gibbum (Campeloma) Curr. ..128, 129 



Rufum meridionale (Campeloma) Pils. . . 129 



Rugifera Simp 62, 63, 178 



Rugosa (Goniobasis) Lea 158 



Rugosum (Sphrerium) Sby 188 



Rugosus (Anodon) Sw. 176 



Saffordii (Physa) Lea 114 



Sageri (LTnio) Con ■. . . . 183 



Salsa (Paludestrina) Pils 139 



Sampson! (Planorbis) Ancey 103 



Sanctijohannis (Amnicola) Pils 13s 



Sapotalensis (LTnio) Lea 75 



Sargenti (Somatogyrus) Pils 145 



Sayana (Amnicola) Anth 136, 148 



Sayii (Physa) Tapp 115 



Sayunio DeG 175 



Scalariformis (Pyrgula) Wolf 140 



Scalariformis mississippiensis (Pyrgula) 



Pils 140 



Scalariformis (Pyrgulopsis) Wolf 140 



.Scalaris (Ameria) Tryon 103 



Scalaris (Paludina) Jay '103 



Scalaris (Physa) Haldeman .'. 103 



Scalaris (Planorbis) Jay 103 



Scalenaria Raf 80, 81 



Scalenia (Obliquaria) Raf 172 



Scarborough! (Amnicola) Tryon 136 



Schizostoma Lea 162 



Scholtzi (Pisidium) Cless 200 



Schrokingeri (Amnicola) Frfld 135 



Scriptum (Alasmodon) Raf 178 



Securis (Plagiola) Lea 179 



Securis (Unio) Lea 69 



Seemanni (Hydrobia) Frld 139 



Seemanni (Bythinella) Pils 139 



Segmentina Flem 10, 13, 104 



Selecta (Quadrula) Wheeler 169 



Seminalis (Fluminicola) Hds 141, 142 



Seminalis (Paludina) Hds 142 



Seminalis dalli (Fluminicola) Call 142 



Shastensis (Goniobasis) Lea 160 



Sheldoni (Amnicola) Pils 140 



Sheldoni (Pyrgulopsis) Pils 140 



Shimekii (Ancylus) Pils 119 



Shimekii (Ferrissia) Pils 119 



Shepardianus duttonianus (Unio) DeG... 1S2 



Showalteri (Gyrotoma) Lea 163 



Showalteri (Lepyrium) Lea 164 



Showalteri cahawbensis (Lepyrium) Pils. . 164 



