INDEX OF SPECIFIC NAMES. 



1383 



obtusus (a) — Anibonychia, Asaphus, By- 

 thocypris, Coelocaulus, Conchopeltis 

 (Mctoptoma), Cypricardites, Cyrto- 

 ddnta, Isotelus, Lingula, Liospira, 

 Modiola, Modiolopsis, Murchisonia, On- 

 chometopus, Orthis, Orthonychia, Pa- 

 Isearca, Posidonomya, Raphistoma, 

 Scenella. 



obvius (a) — Lichas, Lichas (Oncholichas). 



occasus — Bronteus, Goldius. 



occidens — Favosites, Modiolopsis, Old- 

 hamia (Murchisonites), Phanerotrenia, 

 Pleurotomaria labrosa. 



occidentalis (e) — Arctinurus, Clisospira, 

 Conchidium, Dinierocrinus, Ectoniaria 

 pagoda, Eurystomites undatus, Favo- 

 sites forbesi, Glyptaster, Hebertella, 

 Holopea, Leptobolus, Lichas boltoni, 

 Lituites undatus, Nautilus, Odonto- 

 caulis, Orthis, Orthodesma, Pachy- 

 dictya, Pentamerus, Petraia pygmaea, 

 Platystrophia, Plectoceras undatus, 

 Pterinea, Receptaculites, Solenospira 

 pagoda, Strophomena fluctuosa, Thy- 

 sanocrinus. 



oceanus (a) — Maclurea, Maclurites, Nau- 

 tilus. 



ocellatus — Girvanella, Strephochetus. 



octobrachiatus — Dichograpsus, Dicho- 

 grapsus, Graptolites (Didymograpsus), 

 Graptolithus, Graptolithus (Logano- 

 graptus). 



octocostatus — Spirifer (Delthyris). 



octonarius — Dichograpsus, Dichograptus, 

 Graptolithus, Graptolithus (Mono- 

 prion). 



octonotatus — Protichnites. 



oculata — Prasopora. 



oculifera — Beyrichia, Ceratopsis, Eury- 

 chliina, Tetradella. 



oehanus (a) — Heterocrinus, Ileterorrinus 

 (Iocrinus), Ohiocrinus, Rhytimya. 



oehlerti — Coclidium, Coelocaulus, Murchi- 

 sonia. 



oeilensis — ( 'risinella. 



offleyensis— Zaphivntis. 



oflula — Leptotrypa, Paleschara, Petigo- 

 pora. 



ohioensis — Callopora, Ceramopora, Cera- 

 moporella, Ctenodonta, Labechia, Lio- 

 clemella, Lophospria, Monticulipora, 

 Pleurotomaria, Receptaculites, Spiri- 

 fer (Delthyris), Trimerella, Trocho- 

 nema pauper, Whitella, Zaphrentis. 



oligoptychus — Spirifer, Spirifer (Eospiri- 

 fer) niagarensis. 



oligotheca — Climacograptus. 



olorus— Cycloceras, Orthoceras. 



ommanneyi — Endoceras, Orthoceras. 



onealli — Acidaspis, Callopora, Callopora 

 sigillaroides, Chsetetes, Hallopora, Mon- 

 ticulipora, Monticulipora(IIeterotrypa), 

 Odontopleura, Reteocrinus. 



oneidaense — Orthoceras. 



Ontario— Tetradium. 



ontarioensis — Dendrograptus. 



opertus— Bellerophon (Bucania). 



ophelia — Holopea. 



oppletum — Yaginoceras. 



ops — Camarella, Parastrophia. 



orbicauda — Illsenus. 



orbicaudatus — Bumastus, Illsenus. 



orbicularis — Ambonychia, Atrypa, Mo- 

 nomorella, Orthis, Posidonomya, Pte- 

 rinea. 



orbiculatus (a) — Avicula, Carinaropsis, 

 Ceramopora, Ceramoporella, Helcion, 

 Mesotrypa. 



orbiculoides — Amphiccelia, Lyriopecten. 



orbignyanus — Bathyurus. 



orbipora — Stictopora, Stictotrypa. 



orcas — Cyrtoceras, Oncoceras. 



ordinaria — Schuchertia. 



ordinata (um) — Cladopora, Orthoceras. 



orestes — Acaste, Astreopora, Cyrtoceras, 

 Madrepora, Phacopidella, Phacops. 



organum — Sarcinula, Syringophyllum. 



orientalis — Camarotoechia, Discina, Pras- 

 opora simulatrix, Rhynchonella. 



orion — Agnostus. 



orithyia — Metopt.oma, Scenella. 



ornatissimus— Holocystites. 



ornatus (a, um) — Asaphocrinus, Cariocri- 

 nites, Caryocrinites, Caryocrinus, Chi- 

 ca^ocrinus, Conocardium, Cryptony- 

 mus, Ctenocrinus, Cyrtolites, Encri- 

 nurus, Eopteria, Eucalyptocrinus, 

 Glyptocrinus, Habrocrinus, Ilercocri- 

 nus, Holocystites, Lecanocrinus, Leper- 

 ditella, Leptotrypa, Macrostylocrinus, 

 Periechocrinus, Porcellia, Protoycolex, 

 Saccocrinus, Siderocrinites, Sidero- 

 crinus, Tentaculites, Trematopora, 

 Trematopora primigcnia. 



orodes — Cyclostomiceras, Cyrtoceras. 



orphyne — Mctoptoma, Palseacmsea. 



crthambonites — Orthis. 



orthididea — Leptama, Strophomena. 



