INDEX. 



339 



Pleurodon 



Polyodonta 



Poromya anatinoides 

 granulata 



Poronia rubra 



Potamida 



Potomomya 



Prisodon 



Prop t era 



Psammobia affinis 



Dumontii 

 Ferroensis 

 florida 

 leevis 

 muricata 

 tellinella 

 vespertina 



Psammocola . 



Psammophila . 



Psammosolen . 



Psammotcea . 



Pseudamusium 



Psilopus 



Pteria 



Ptychina 



Pullastra 



Puschia 



Pyxis 



Quadrula 



Rhombo'ides 



Rhombus 



Rotundaria 



Sanguinolaria fusca 



Saxicava arctica 

 carinata 

 distorta 

 fragilis 

 gallicana 

 pholadis 

 rhombdides 

 rubra 

 rugosa 

 striata 

 sulcata 



PAGE 

 121 



123 



97 



75 



75 



75 



235 



235 



75 



151 



218 



298 



252 



254 



254 



253 



256 



256 



256 



255 



256 



256 



256 



256 



253 



258 



289 



276 



128 



288 



143 



106 



278 



245 



161 



101 



112 



237 



97 



202 

 203 

 204 

 201 

 136 

 119 

 231 



