INDEX. 



189 



Paludina 



Parmacella 



Parmophora 



Patella . 



Pandora 



Panopea 



Pecten . 



Pectenaria 



Pectuuculus 



Pedum . 



Pectinides 



Peristamides 



Perna . 



Petricola 



Phasianella 



Pholas . 



Pholadaria 



Physa . 



Phyllidia 



Phyllidiacea 



Pirena . 



Pinna 



Pileopsis 



Planorbis 



Plicacea 



Planaxis 



Placuna 



Pleurotoma 



Plicatida 



Plagiostoma 



Pneumodermon 



Pollicipes 



Podopsis 



Psammobia 



Psammotea 



Pteroceras 



Pteropoda 



Pupa 



Pupa 



Purpura 



Purpurifera 



Pyramidella 



Pyrula . 



Pyrgoma 



Ranella 

 Ricinula 

 Rostellaria 



R. 



104 



97 



95 



40 



31 



82 



13 



64 



80 



80 



119 



77 



41 



137 



27 



26 



117 



93 



93 



119 



75 



99 



116 



128 



136 



88 



140 



83 



83 



93 



22 



85 



43 



43 



150 



92 



110 



111 



155 



151 



129 



144 



21 



145 

 153 

 149 



