INDEX 



167 



Planorbis virens pi/ 



vortex 82, 85 



vulgaris 82 



wheatleyi 97, 98 



yzabalensis 82, 86 

 Planorbula (97), 98 



armigera 98 



christyi gg 

 Plesiophysa lOl 

 Pleurocera iib 



canaliculata Jib 

 PleuroHmnaea (60), 63, 64 



tenuicostata 60 

 Poeyia (108) 



gundlachioides 108 

 Polita (39) 



fulva (40) 

 Polygjra 24 



albolabris 26 



Columbiana 24., 34 



devia 24 



germana ^J, 26 



labiosa (24) 



megasoma 26 



monodon 26 



ptychophora 25 



santacruzensis 24 



townsendiana 2^ 

 Poljgyrus (83) 

 Polyrhytis (61), 63, 64 

 Pomatiopsis iig 



lapidaria 119, (120) 

 Pompholjx 63 

 Primella rajmondi (139) 

 Pristiloma 44 



arctica 45 



idahoense 44 



lansingi 44 



pilsbryi 44 



stearnsi (44) , 45 



stearnsii 44 



taylori 44 

 Prophvsaon 4b 



andersoni 4b 



coeruleum ^7 



dubium (47) 



fasciatum (47) 



flavum (46) 



foliolatum 47 



Prophysaon hemphilli (46), 47 



humile 47 



marmoratum (46) 



obscurum (47) 



pacificum (46) 



pallidum (46) 



suffusum (46) 

 Proptera alatus (127) 

 Protancylus 109 

 Pseudohyalina minuscula (43) 



pugetensis (43) 

 Pterosygna 131 

 Pulmobranchia loi 

 Punctum 5j 



asteriscus 53 



clappi 51, 5i 



conspectum 10, S3 



minutissimum (53) 



pugetensis (43) 



pygmaeum jj 



randolphi §3 

 Pupa alticola (54) 



arctica (32) 



armifera (27) 



badia (28) 



bigranata (28) 



bland i (28) 



columella (54) 



contracta (27) 



corpulenta (29) 



costulata (21) 



decora (29) 



edentula (54) 



exigua (116) 



gouldii (30) 



gredleri (54) 



holzingeri (28) 



hoppii (29) 



lundstromi (28) 



milium (32) 



modesta (29) 



pentodon (28) 



pygmsea (33) 



signata (28) 



simplex (54) 



steenbuchi (29) 



superioris (33) 

 Pupidse 27 

 Pupilla 28 



