xin 



Pisania Claibornensis 78. striata 



98. 

 Pisidium conieum 197. fontinale 



187. Gassiesianum 190. insigne 



97. milium 190. pusillum 184. 



Steenbuchi 97. supimim 195. 

 Pithys vid. Helix. 

 Planaxis abbreviata 98. atra 104. 



fasciata 98. 

 Planeta Everetti 226. 

 Planorbis arcticus 97. Berendti 



80. circumstriatus 82. declivis 



106. Esperanzensis 80. Hornii 



77. limophilus 181. Malmi 181. 

 Oregonensis 77. Rossiteri 221. 



Plecotrema Blesensis, Bourgeoi- 



si, Delaunayi, marginalis 213. 

 Plectosolen 82. 

 Pleiodon Macmurtrei 105. 

 Pleurobranchus delicatus, gran- 



dis, ovalis, tessellatus 98. 

 Pleurocera bicinctum 79. Conradi 



73. 

 Pleuromeris 87. 

 Pleurotoma adeona 78. albicari- 



nata 224. bicarinata 92. capax 



78. dentatum 215. laterculata 

 224. latifasciata 224. lirata 

 104. monilifera 104. nasuta 78. 

 Peaseana D. 158. persa 78. 



Pleurotomaria perlata77. Schlum- 



bergeri 222. 

 Plicatula echinata D. 174. per- 



imbricata 102. 

 Pomatiopsis intermedia 77. 

 Posydonomya Blatchleyi 102. 

 Potamides Alabamieiisis 78. 

 Potamopyrgus 74. 

 Prisconaia 87. 

 Proto Cornelliana 106. 

 Protocardia curta 103. lima 75. 

 Protoma Knockeri 223. 

 Prunum bella, eburneola, lima- 



tula, Virginiana 97. 



Pseudocardia 81. 

 Pseudodon ellipticum 79. 

 Pseudoliva elliptica 78 

 Pterocyclos eudaedaleus 216. 



Hainanensis 223. parva 79. 

 Ptychatractus 74. 

 Ptychosalpinx 90. 93. 

 Pulviuites argentea 87. 

 Pupa Arizonensis 86. caspia P. 



70. hordaeea 86. Mariei 221. 



Moreleti 214. 

 Pupoidea scalariformis 81. 

 Purpura Crossei 213. exilis D. 



154. fusco-nigra D. 154. mar- 



morata 98. porphyroleuca 212. 

 Pyrgula scalariformis 107. 

 Pyrifusus 101. 

 Pyrula juvenis 78. 

 Pythia tortuosa 216. 

 Radioconcha 103. 

 Radula dentieuticosta 105. pu- 



silla 226. tenuis 226. 

 Raeta gibbosa 103. 

 Ranella elegantula D. 165 Tam- 



paeensis 105. 

 Rapa bulbiformis 224. 

 Realia affinis 79. eostata 92. 



elongata 92. laevis 79. ochro- 



stoma 79. scalariformis 79. va- 



riabilis 79. 

 Recluzia Hargravesi 224. 

 Rhysota Antonii 144. globosa 



144. striatula 145. 

 Rimula Verrieri 221. 

 Rissoa Cooperi 77. exilis 80. 



flammea 95. semicostata 95. 

 Rissoina balteata 104. costulata 



95. crassa 227. Lamberti 215. 



semiplicata 95. striatula 95. 



tenuistriata 95. 

 Rostellaria Boutillieri, Escheri 



213. 

 Rotula 137. 

 Rumina teres 223. 



