Index 



209 



Parallela (Ferrissia) Hald 119 



Parallelus (Ancylus) Hald 119 



Paraptera Ortmann 65, Tz, 180 



Parkeri (Physa) Curr 111 



Parkeri (Pleurocera) Tryon 200 



Parkeri (Quadrula) Geiser 170 



Parva (Amnicola) Lea 135 



Parva (Amnicola) Marsli 135 



Parva (Angitrema) Weth 150 



Parva (Lampsilis) Bar 183 



Parva (Lithasia) Weth 150 



Parva (Physa) Lea 113 



Parvulus (Soniatogyrus) Tryon 144 



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



Parvus walkeri (Planorbis) Van 102 



Parvus (Unio) Bar 76, iSo 



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 



Pefsonatus (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 67 



Physa Drap 15, 16, 106 



Physemoda Raf 200 



Physidae 3. 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 145 



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 



PlanorbidK 5. 9. 94 



Planorbina Hald 11, 94 



Planorbinae 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, 



Plenum (Pleurocera) Anth 



Plenus interduos (Unio) DeG 



Plethobasus Simp 43, 49, 



Pleuristriata marmocki (Goniobasis) Weth. 

 Pleuristriatus comalensis (Goniobasis) Pils. 



Pleurobema Raf 43, 50, 



Pleurocera Raf 34, id, 149, 



Pleuroceridse 23, 33, 



Pleuroceratidre 



Plexata (Planorbis) Ing 



Plicata (Lithasia) Weth 



Plicata (Quadrula) Say 



Plicata-striata (Goniobasis) Weth 



Plicatula (Goniobasis) Lea 



Plicatum (Pleurocera) Tryon 



Plicifera (Goniobasis) Lea 



Plicifera bulimoides (Goniobasis) Tryon . 

 Plicifera oregonensis (Goniobasis) Tryon 



Pluristriata (Melania) Say 



Politissima (Physa) Tryon 113, 



Polymesoda Raf 85, 



Poly rhytis Meek 6 



Pomatiopsinae Stimp zy, 34, 



Pomatiopsis Tryon 34, 



Pomilia (Physa) Con 



Pompholyginx Dall 14, 



Pompholyx Lea 14, 



Ponderosum coarctatum (Campeloma) Lea 



Ponderosus (Bariosta) Raf 



Ponsonbyi (Carinifex) E. A. Sm 



Ponsonbyi (Planorbis) Sby 



Porrecta (Goniobasis) Lea 



Potamopyrgus Stimp 28, 30, 



Powellensis (lo) C. C. Ads 



Praeclarus (Ancylus) "Stimp." Lea 



Prjeclarus (Lanx) "Stimp." Lea 



Prrerosa (Melania) Say 



Pressodonta Simp 62, 



Primeana (Physa) Tryon iii, 



Primella Coop 



Prolasmidonta Ort (>2, (>},, 



Propecxiatus (Unio) DeG 



Propesulcatus (Unio) DeG 



Propeverutus (Unio) DeG 



Propinqua (Physa) Tryon 107, 



Proptera Raf 65, 71, 177, 



Protea (Amnicola) Gld 



Protea (Bythinella) Stearns 



Protea (Paludestrina) Gld 



Protea (Tryonia) W. G. Binn 



Protexta (Cyrena) Con 



Proxima (Goniobasis) Say 



Pseudogalba Baker g, 93 



Pseudoon Simp "jz, 74 



Pseudosuccinea Baker 6, 7 



Pterosygna Raf 59, 61 



Ptychobranchus Simp 65, 66, 178 



Pudicum (Pleurobema) Lea 171, 173 



Pulchella (Goniobasis) Lea 158 



Pulla (Goniobasis) Lea 160 



Pullatus majusculus (Unio) DeG 174 



Pullus (Unio) Lea i8r 



Pulmonata 5, 93 



Pumila (Anculosa) Con 145 



