1386 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



pennsylvanicus (a) Klcedenella, Klce- 

 denia, Leperditia, Onchus. 



pentagonalis Cupellsecrinites, Cupellae- 

 crinus, Marsipocrinus. 



pentagonius Porocrinus. 



pentagonus (a, um) Arachnophyllum, 

 Glyptocrinus insperatus, Heterocrinus, 

 Pterotheca, Siphonocrinus, Stenocri- 

 nus, Strombodes. 



pentalobus Codaster, Stephanocrinus. 



pentangularis Callicrinus, Dimerocri- 

 nus, Glyptaster, Thysanocrinus. 



pentolena Palseocystis. 



peosta Diplograptus, Graptolithus. 



pepina Billingsella, Orthis, Orthis (Or- 

 thisina). 



pepinensis (e) Euomphalus, Raphisto- 

 ma. 



peracuta (um) Bucania, Ctenodonta, 

 Lophospira, Murchisonia, Raphistoma. 



perampla Crepipora. 



perangulata (um) Ambonychia, Lopho- 

 spira, Murchisonia bicincta, Orthoceras, 

 Psilonychia. 



perantiquus (a) Enallopora, Chaetetes, 

 Gorgonia, Protocrisina. 



perarmata Acidaspis. 



percarinata (um) Crania, Cyclonema, 

 Pleurotomaria. 



percingulata (um) Cyclonema. 



percrassus Dictyonema. 



perdentatus Eunicites, Lumbriconerei- 

 tes. 



perdewi Pseudocrinites. 



perelegans Graptodictya, Heliolites, Pti- 

 lodictya. 



perexilis (e) Dicellograptus sextans, Dic- 

 tyonema. 



perflexilis Goniograptus. 



perflexus Didymograpsus. 



perforator Ceraurus (Nieszkowskia), Che- 

 irurus, Nieszkowskia. 



perforates (a, um) Diaphorostoma, Bel- 

 lerophon (Bucania), Cliocrinus, Lopho- 

 spira. 



perfrondosa Dekayia, Dekayella prolif- 

 ica. 



pergibbosus Pentamerus. 



pergracilis (e) Buthotrephis, Dictyone- 

 ma, Desmograptus, Subulites. 



perinflata Beyrichia, Kloedenia. 



perkinsi Bathyurus, Cryptozoon, Eccy- 

 . liomphalus, Euomphalus, Nautilus, Ni- 

 leus, Ooceras, Tarphyceras. 



perlamellosa (um) Lophospira, Murchi- 

 sonia, Rhynchonella, Rhynchotrema. 



perlatus (a) Liospira, Modiolopsis, Pleu- 

 rotomaria, Retiolites, Retiolites (Gla- 

 diograptus). 



perlongus Holocystites. 



perminima Primitia. 



perminuta Ctenodonta. 



permultus Trachomatichnus. 



pernodosus Encrinurus. 



pernoides Mytilarca, Streptomytilus. 



perornata Bucania. 



perovalis Archinacella, Metoptoma. 



perovata Glossina, Lingula, Palseoglossa. 



perparvum Orthoceras . 



perplexus (a) Diabolocrinus, Dionide, 

 Lingula, Moorea. 



perroti Orthoceras. 



perryi Lingula. 



perseus Orthoceras. 



persimilis Amplexopora, Callopora pul- 

 chella, Cypricardites, Cyrtodonta, Hal- 

 lopora pulchella, Leperditella, Leper- 

 ditia, Liospira. 



persiphonatum Huronia, Orthoceras. 



personata Stigmatella. 



perspicator Bathyurus, Goniurus. 



perstriata Helicotoma. 



persulcata Beyrichia, Bollia. 



pertenuis (e) Coenograptus, Dictyone- 

 ma, Diplograptus amplexicaulis, Fen- 

 estella, Nemagraptus, Nemagraptus 

 explanatus, Phacelopora, Rhopalona- 

 ria. 



pertinax Orthoceras. 



perundosa Holopea. 



perungulatus Corynoides gracilis. 



pervagata Plectorthis equivalvis. 



pervetus (a) Dalmanella, Dalmanella 

 subaequata, Euomphalus, Inachus, 

 Orthis, Pianodema subsequata. 



pervetustus (a) Cyclonema, Cyclostoma, 

 Euconia, Euomphalus, Holopea, Holo- 

 pea antiqua, Pleurotomaria, Straparol- 

 lus. 



pervoluta Bucania, Tremanotus, Proto- 

 warthia, Sinuites. 



pesovis Pentamerus. 



petalliformis Plasmopora, Porites. 



petasiformis Amplexopora, Amplexopo- 

 ra welchi, Monotrypa, Monticulipora, 

 Monticulipora welchi. 



petechialis Chaetetes, Monticulipora, Pe- 

 tigopora. 



