Index 



209 



Parallela (Ferrissia) Hald 119 



Parallelus (Ancylus) Hald 119 



Paraptera Ortmann 65, 72, iSo 



Parkeri (Physa) Curr iii 



Parkeri (Pleurocera) Tryon 200 



Parkeri (Quadrula) Geiser 170 



Parva (Amnicola) Lea 135 



Parva (Amnicola) Marsh 135 



Parva (Angitrema) Weth 150 



Parva (Lampsilis) Bar 183 



Parva (Lithasia) Weth 150 



Parva (Physa) Lea 113 



Parvulus (Somatogyrus) Tryon 144 



Parvus (Planorbis) Say 13, 94, 102, 104 



Parvtis walkeri (Planorbis) Van 102 



Parvus (Unio) Bar Tii, 180 



Patelloides (Ancylus) Lea 117 



Patelloides (Lanx) Lea 17, 117 



Paulensis (lo) C. C. Ads 199 



Pectinibranchia 23, 123 



Pegias Simp 62, 63, 178 



Peninsulae (Ancylus) P. and J 121 



Peninsulae (Ferrissia) P. and J 121 



Pennsylvanica (Goniobasis) Pils 159 



Pennsylvanicus (Somatogyrus) Walk. . . . 145 



Peracuta (Amnicola) P. and W 136 



Perdix (Lampsilis) Lea 183 



Perfecta (Bythinia) Frfld 132 



Perforatus (Planorbis) Sby 102 



Perplexa (Truncilla) Lea 186 



Perplicata quintardii (Quadrula) Cragin . 170 



Perpurpurea (Lampsilis) Lea 183 



Personatus (Unio) Say 83 



Pertenuis (Unio) DeG 183 



Peruviana (Quadrula) Lam 168 



Perversa (Neritina) Gmel 38 



Phalena (Anodonta) DeG 176 



Phaseolus (Ptychobranchus) Hild. ...178, 179 



Phaseolus (Unio) Hild d-j 



Physa Drap 15, 16, 106 



Physemoda Raf 200 



Physidae 5, 15, 106 



Picta (Lampsilis) Lea 183 



Pierosoma Dall 11, 94 



Pilea Simp .80, 82 



Pilsbryi (Amnicola) Walk 13S 



Pilsbryi (Lioplax) Walk 129 



Pilsbryanus (Somatogyrus) Walk 143 



Pinei (Ampullaria) Dall 124 



Piscinalis (Valvata) Miill 131 



Pisidium C. Pfr 85, 88, 189 200 



Plagiola Raf 65, 69, 179 



Planorbella Hald 10, 12, 94 



Planorbidae 5, 9, 94 



Planorbina Hald 11, 94 



Planorbinse H. and A. Ads 9, 10, 94 



Planorbis Miill 10, 04 



Planorbula Hald 14, 104 



Planulatus (Planorbis) Coop loi, 102 



Platynaias Walk 59, 60, 177 



Platypoda 23, 123 



Pleasii (Lampsilis) Marsh 183 



Plebeius (Goniobasis) Anth 159 



Plena (Melania) Anth 36 



Plena (Quadrula) Lea 167, 168 



Plena (Strephobasis) Anth 149, 152 



Plenum (Pleurocera) Anth 154 



Plenus interduos (Unio) DeG 169 



Plethobasus Simp 43, 49, 171 



Pleuristriata marmocki (Goniobasis) Weth. 156 



Pleuristriatus comalensis (Goniobasis) Pils. 156 



Pleurobema Raf 43, 50, 171 



Pleurocera Raf 34, 36, 149, 151 



Pletiroceridffi 23, 35, 149 



Pleuroceratidae 149 



Plexata (Planorbis) Ing 102 



Plicata (Lithasia) Weth 150 



Plicata (Quadrula) Say 168 



Plicata-striata (Goniobasis) Weth 160 



Plicatula (Goniobasis) Lea 158 



Plicatum (Pleurocera) Tryon -151 



Plicifera (Goniobasis) Lea 160 



Plicifera btilimoides (Goniobasis) Tryon . 160 



Plicifera oregonensis (Goniobasis) Tryon 160 



Pluristriata (Melania) Say 156 



Politissima (Physa) Tryon 113, 115 



Polymesoda Raf 85, 187 



Polyrhytis Meek 6, 9 



Pomatiopsinae Stimp 27, 34, 148 



Pomatiopsis Tryon 34, 1 48 



Pomilia (Physa) Con 113 



Pompholyginas Dall 14, 105 



Pompholyx Lea 14, 105 



Ponderosum coarctatum (Campeloma) Lea 128 



Ponderosus (Bariosta) Raf 170 



Ponsonbyi (Carinifex) E. A. Sm 106 



Ponsonbyi (Planorbis) Sby 106 



Porrecta (Goniobasis) Lea 160 



Potamopyrgus Stimp 28, 30, 140 



Powellensis (lo) C. C. Ads 199 



Praeclarus (Ancylus) "Stimp." Lea 118 



Prseclarus (Lanx) "Stimp." Lea 118 



Praerosa (Melania) Say 37 



Pressodonta Simp (,2, 178 



Primeana (Physa) Tryon iir, 113 



Primella Coop i88 



Prolasmidonta Ort 62, 63, 178 



Propecaslatus (Unio) DeG 185 



Propesulcatus (Unio) DeG 186 



Propeverutus (Unio) DeG 175 



Propinqua (Physa) Tryon 107, 113 



Proptera Raf 65, 71, 177, 180 



Protea (Amnicola) Gld 138 



Protea (Bythinella) Stearns 138 



Protea (Paludestrina) Gld 138 



Protea (Tryonia) W. G. Binn 138 



Protexta (Cyrena) Con 187 



Proxima (Goniobasis) Say 160 



Pseudogalba Baker 9, 93 



Pseudoon Simp 73, 74 



Pseudosuccinea Baker 6, 7 



Pterosygna Raf 59, 61 



Ptychobranchus Simp 65, (y(s, 178 



Pudicum (Pleurobema) Lea 171, 173 



Pulchella (Goniobasis) Lea 138 



Pulla (Goniobasis) Lea 160 



Pullatus majusculus (Unio) DeG 174 



Pullus (Unio) Lea 181 



Pulmonata 3, 93 



Pumila (Anculosa) Con 143 



