INDEX OF SPECIFIC NAMES. 



1383 



obtusus (a) Ambonychia, Asaphus, By- 

 thocypris, Coelocaulus, Conchopeltis 

 (Metoptoma), Cypricardites, Cyrto- 

 donta, Isotelus, Lingula, Liospira, 

 Modiola, Modiolopsis, Murchisonia, On- 

 chometopus, Orthis, Orthonychia, Pa- 

 Isearca, Posidonomya, Raphistoma, 

 ^cenella. 



obvius (a) Lichas, Lichas (Oncholichas). 



occasus Bronteus, Goldius. 



occidens Favosites, Modiolopsis, Old- 

 hamia (Murchisonites), Phanerotrema, 

 Pleurotomaria labrosa. 



occidentalis (e) Arctinurus, Clisospira, 

 Conchidium, Dimerocrinus, Ectomaria 

 pagoda, Eurystomites undatus, Favo- 

 sites forbesi, Glyp taster, 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. 



cehanus (a) Heterocrinus, Heterocrinus 

 (locrinus), Ohiocrinus, Rhytimya. 



oehlerti Coelidium, Coelocaulus, Murchi- 

 sonia. 



ceilensis Crisinella . 



offleyensis Zaphrcntis. 



offula Leptotrypa, Paleschara, Petigo- 

 pora. 



oliioensis 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 Vaginoceras. 



ops Camarella, Parastrophia. 



orbicauda Illaenus. 



orbicaudatus Bumastus, Illsenus. 



orbicularis Ambonychia, Atrypa, Mo- 

 nomorella, Orthis, Posidonomya, Pte- 

 rinea. 



orbiculatus (a) Avicula, Carinaropsis, 

 Ceramopora, Ceramoporella, Helcion, 

 Mesotrypa. , 



orbiculoide s Amphic oelia , Lyriopecten . 



orbigny ami s B athyurus . 



orbipora Stictopora, Stictotrypa. 



orcas Cyrtoceras, Oncoceras. 



ordinaria Schuchertia. 



ordinata (um) Cladopora, Orthoceras. 



orestes Acaste, Astreopora, Cyrtoceras, 

 Madrepora, Phacopidella, Phacops. 



organum Sarcinula, Syringophyllum. 



orientalis Camarotcechia, Discina, Pras- 

 opora simulatrix, Rhynchonella. 



orion Agnostus. 



orithyia Metoptoma, Scenella. 



ornatissimus Holocystites. 



ornatus (a, um) Asaphocrinus, Cariocri- 

 nites, Caryocrinites, Caryocrinus, Chi- 

 cagocrinus, Conocardium, Cryptony- 

 mus, Ctenocrinus, Cyrtolites, Encri- 

 nurus, Eopteria, Eucalyptocrinus, 

 Glyptocrinus, Habrocrinus, Hercocri- 

 nus, Holocystites, Lecanocrinus, Leper- 

 ditella, Leptotrypa, Mac rosty locrinus, 

 Periechocrinus, Porcellia, Protoscolex, 

 Saccocrinus, Siderocrinites, Sidero- 

 crinus, Tentaculites, Trematopora, 

 Trematopora primigenia. , 



orodes Cyclostomiceras, Cyrtoceras. 



orphyne Metoptoma, Palaeacmaea. 



orthambonites Orthis. 



ortliididea Leptaena, Strophomena. 



