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U.S. NATIONAL MUSEUM BULLETIN 287 



grammatospira 



Ostrea 



alepidota 



falco 



fisheri 



kauaia 



kupua 



laysana 



normal is 



pauciplicata 



perplicata 



podagrina 



rugifera 



serra 



thaanumi 



tubulifera 



vaughani 

 ■^Otion 



stimpsoni 

 Oudardia 



button! 

 Ovula 



barbarense 



multicarinata 

 *Ovulactaeon 



meekii 

 *Oxymeris 



indenta 

 Oxystyla 



nesiotica 

 Pachycheilus 



anagrammatus 



satillensis 



suavis 

 Pachypoma 



barbarensis 



depressum 



lithophorum 



magdalena 



pacifica 



precursor 



spirata 

 Padollus 



pourtalesii 

 Pallium 



miser 

 *Pallochiton 



lanuginosus 

 Paludestrina 



aldrichi 



cingulata 



curva 



milium 



satillensis 



turricula 

 * Panacea (Panocca) 

 Pandora 



arctica 



bushiana 



dodona 



floridana 



gabbi 



gouldiana 



grandis 



lata 

 *Panocochlea 



rubidus 

 Panomya 



ampla 



beringiana 



chrysis 



turgida 

 Panopea (Panope) 



globosa 



similaris 



solida 



taeniata 



whitfieldi 

 ^*Pantellaria 

 *Papalaria 

 Paphia 



sulculosa 

 Papyridea 



bulbosum 



harrimani 



turtoni 

 *Parachondria 

 *Paradines 

 *Paradione 

 *ParaIagena 

 *Paralepida 

 *Parametaria 

 Paranassa 



isogramma 

 *Parasagena 



georgiana 



sagenata 

 *Paraspira 

 Parastarte 



concentrica 

 *Parmulina 

 *Parmulophora 

 Parthenia 



cedrosa 

 Parthenina 



meta 

 *Parvilucina 



approximatus 



crenella 

 eucosmia 

 intensa 

 pemphigus 

 piluliformis' 

 prunus 

 sphaeriolus 

 *Pascula 



citricus 

 *Patellipurpura 

 *Patinella 

 *Patinigera 

 *Patinopecten 

 rhytidus 

 Patula 



concentrata 

 Patulastra 

 pugetensis 

 *Patulaxis 

 *Payettia 

 Payraudeautia 



nubila 

 Pecten 



acanthodes 



alaskensis 



albidus 



alpha 



alumensis 



amplicostatus 



arces 



bowdenensis 



burnsii 



cactaceus 



caloosaensis 



cataractes 



centrotus 



chipolanus 



coccymelus 



cocoanus 



cocosensis 



compactus 



condylomatus 



darlingtonensis 



davidsoni 



demiurgus 



diegensis 



dilleri 



diomedeus 



effluens 



erythrocomatus 



eucymatus 



eugrammatus 



expansus 



felipponei 



