1386 BULLETIN 92, UNITED STATES NATIONAL MUSEUM. 



pennsylvanicus (a) — Kloedenella, Klce- 

 denia, Leperditia, Onchus. 



pentagonalis — Cupellaecrinites, Cupellse- 

 crinus, Marsipocrinus. 



pentagonius — Porocrinua. 



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, Murchiaonia, Raphistoma. 



perampla — Crepipora . 



perangulata (um) — Ambonychia, Lopho- 

 spira, Murchisonia bicincta, Orthoceras, 

 Psilonychia. 



perantiquus (a) — Enallopora, Chsetetes, 

 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. 



perforatus (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, Klcedenia. 



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 — Prim it ia . 



perminuta — Ctenodonta. 



permultus — Trachomatichnus. 



pernodosus — Encrinurus. 



pernoides — Mytilarca, Streptomytilus. 



perornata — Bucania. 



perovalis — Archinacella, Metoptoma. 



perovata — Glossina, Lingula, Palosoglossa. 



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 

 subsequata, Euomphalus, Inachus, 

 Orthis, Pianodema subaequata. 



pervetustus (a) — Cyclonema, Cyclostoma, 

 Euconia, Euomphalus, Holopea, Holo- 

 pea antiqua, Pleurotomaria, Straparol- 

 lus. 



pervoluta — Bucania, Tremanotus, Proto- 

 warthia, Sinuitea. 



pesovis — Pentamerus. 



petalliformis — Plasmopora, Porites. 



petasiformis — Amplexopora, Amplexopo- 

 ra welchi, Monotrypa, Monticulipora, 

 Monticulipora welchi. 



petechialis — Chsetetes, Monticulipora, Pe- 

 tigopora. 



