INDEX 



165 



Paludina decisa (125) 



emarginata (ii8) 



grana (118) 



hyalina (91) 



Hmosa (117) 



lustrica 120 



nuclea (119) 



obtusa (118) 



porata (117) 



seminalis (119) 



virens (119) 

 Paraspira 82, 86 

 Parmacellina (36) 



vitrinaeformis 36 

 Patella (107) 



lacustris 107, I08 

 Patula 49 



asteriscus (51) 



cronkhitei (50) 



occidentalis 4g 



pauper 50, 51 



solitaria (49) 



striatella 50 

 Patulastra pugetensis (43) 

 Periophthalmus 115 

 Petasia (39) * 



fabricii (41) 



fulva 40 



trochiformts (40) 

 Phenacarion foliolatus (47) 



hemphilli (47) 

 Phenacolimax (36) 

 Phymesoda dubia (141) 



idahoensis (141) 



scutellata 141 



virginica 141 

 Physa II, 63, (81), 84, pp, (100), lOI, 

 102, (104), 105, 107 



albofilata (102) 



ampullacea loj 



ancillaria 102 



bullata (103) 



columnaris 99, loi 



contorta 99 



costata 100, loi 



crassa (102) 



elongata (106) 



elongatina 107 



fontinalis 11, 99, (1Q2), IQ5 



Physa fragilis (loi) 



glabra (106) 



globosa 99 



guildingii 99, lOO 



gyrina lOl 



heterostropha loi, 103 



hildrethiana 102 



hordeacea loj, 107 



hypnorum (106) 



lata (loi) 



lordi/o^, 103 



microstoma 99 



obesa (102) 



oleacea (102) 



parkeri (102), 103 



philippii (loi) 



plicata (loi) 



polaris 107 



primeana (loi) 



propinqua loj 



turrita (106) 



vinosa 102 

 Physastra (61), 62, 64 



vestita 61, 64 

 Phy sella (99), 100 

 Physidae 99, loi 

 Physodon (99), 100 

 Physopsis loo, lOl 

 Phyza (99), (104) 

 Pierosoma 81, 85 



binneyi 87 



corpulentus 87, 88 



trivolvis 88 

 Pisidium 3, 141 



abditum (142), (143) 



abyssomus (143) 



abyssorum (143) 



aequilaterale (141) 



arcticum (144) 



boreale (144) 



compressum (142) 



glaciale (144) 



henslowianum (145) 



idahoense (141) 



nivale (144) 



occidentale (143) 



randolphi (145) 



rotundatum (143) 



scutellatum (141) 



