Opinions from E. Billings 1865
- 'Ampyx semicostatus belongs to Ampyx'
- 'Avicula hermione belongs to Avicula'
- 'Bathyurellus marginiatus belongs to Bathyurellus'
- 'Bathyurellus nitidus belongs to Bathyurellus'
- 'Bellerophon macer belongs to Bellerophon'
- 'Bellerophon miser belongs to Bellerophon'
- 'Bellerophon palinurus belongs to Bellerophon'
- 'Calathium paradoxicum belongs to Calathium'
- 'Ceraurus polydorus belongs to Ceraurus'
- 'Cheirurus mercurius belongs to Cheirurus'
- 'Cheirurus pompilius belongs to Cheirurus'
- 'Cheirurus prolificus belongs to Cheirurus'
- 'Cheirurus satyrus belongs to Cheirurus'
- 'Chiton canadensis belongs to Chiton'
- 'Clisospira curiosa belongs to Clisospira'
- 'Conocardium blumenbachium is recombined as Euchasma blumenbachi'
- 'Conocardium immatura belongs to Conocardium'
- 'Ctenodonta abrupta belongs to Ctenodonta'
- 'Cyclonema hageri belongs to Cyclonema'
- 'Cyclonema montrealense belongs to Cyclonema'
- 'Cyclonema phaedra belongs to Cyclonema'
- 'Ecculiomphalus atlanticus belongs to Ecculiomphalus'
- 'Ecculiomphalus distans belongs to Ecculiomphalus'
- 'Endymion is replaced by Endymionia'
- 'Endymion meeki is recombined as Endymionia meeki'
- 'Eopteria ornata belongs to Eopteria'
- 'Eopteria richardsoni belongs to Eopteria'
- 'Eopteria typica belongs to Eopteria'
- 'Eunema cerithioides belongs to Eunema'
- 'Eunema erigone belongs to Eunema'
- 'Euomphalus uniangulatus is recombined as Ophileta uniangulata'
- 'Helicotoma eucharis belongs to Helicotoma'
- 'Helicotoma gorgonea belongs to Helicotoma'
- 'Helicotoma miser belongs to Helicotoma'
- 'Helicotoma proserpina belongs to Helicotoma'
- 'Helicotoma tritonia belongs to Helicotoma'
- 'Holopea gracia belongs to Holopea'
- 'Holopea guelphensis belongs to Holopea'
- 'Holopea harmonia belongs to Holopea'
- 'Holopea lavinia belongs to Holopea'
- 'Holopea lavinia conica belongs to Holopea lavinia'
- 'Holopea nereis belongs to Holopea'
- 'Holopea ophelia belongs to Holopea'
- 'Holopea pyrene belongs to Holopea'
- 'Lingula briseis belongs to Lingula'
- 'Lingula cobourgensis belongs to Lingula'
- 'Lingula nympha belongs to Lingula'
- 'Lituites pluto belongs to Lituites'
- 'Maclurea acuminata belongs to Maclurea'
- 'Maclurea affinis belongs to Maclurea'
- 'Maclurea crenulata belongs to Maclurea'
- 'Maclurea emmonsi belongs to Maclurea'
- 'Maclurea oceana belongs to Maclurea'
- 'Maclurea ponderosa belongs to Maclurea'
- 'Maclurea rotundata belongs to Maclurea'
- 'Maclurea speciosa belongs to Maclurea'
- 'Maclurea sylpha belongs to Maclurea'
- 'Maclurea transitionis belongs to Maclurea'
- 'Metoptoma alceste belongs to Metoptoma'
- 'Metoptoma anomala belongs to Metoptoma'
- 'Metoptoma augusta belongs to Metoptoma'
- 'Metoptoma erato belongs to Metoptoma'
- 'Metoptoma estella belongs to Metoptoma'
- 'Metoptoma eubule belongs to Metoptoma'
- 'Metoptoma hyrie belongs to Metoptoma'
- 'Metoptoma instabilis belongs to Metoptoma'
- 'Metoptoma melissa belongs to Metoptoma'
- 'Metoptoma montrealensis belongs to Metoptoma'
- 'Metoptoma niobe belongs to Metoptoma'
- 'Metoptoma nycteis belongs to Metoptoma'
- 'Metoptoma orithyia belongs to Metoptoma'
- 'Metoptoma orphyne belongs to Metoptoma'
- 'Metoptoma quebecensis belongs to Metoptoma'
- 'Metoptoma robusta belongs to Metoptoma'
- 'Metoptoma simplex belongs to Metoptoma'
- 'Metoptoma superba belongs to Metoptoma'
- 'Metoptoma trentonensis belongs to Metoptoma'
- 'Metoptoma venillia belongs to Metoptoma'
- 'Murchisonia acrea belongs to Murchisonia'
- 'Murchisonia ada belongs to Murchisonia'
- 'Murchisonia adelina belongs to Murchisonia'
- 'Murchisonia agilis belongs to Murchisonia'
- 'Murchisonia alexandra belongs to Murchisonia'
- 'Murchisonia artemesia belongs to Murchisonia'
- 'Murchisonia augustina belongs to Murchisonia'
- 'Murchisonia cassandra belongs to Murchisonia'
- 'Murchisonia catharina belongs to Murchisonia'
- 'Murchisonia cicela belongs to Murchisonia'
- 'Murchisonia cicelia belongs to Murchisonia'
- 'Murchisonia estella belongs to Murchisonia'
- 'Murchisonia hercynia belongs to Murchisonia'
- 'Murchisonia hermione belongs to Murchisonia'
- 'Murchisonia hyale belongs to Murchisonia'
- 'Murchisonia missisquoi belongs to Murchisonia'
- 'Murchisonia mylitta belongs to Murchisonia'
- 'Murchisonia placida belongs to Murchisonia'
- 'Murchisonia procris belongs to Murchisonia'
- 'Murchisonia simulatrix belongs to Murchisonia'
- 'Murchisonia sororcula belongs to Murchisonia'
- 'Murchisonia vesta belongs to Murchisonia'
- 'Murchisonia vitellia belongs to Murchisonia'
- 'Murchisonia xanthippe belongs to Murchisonia'
- 'Nautilus calciferus belongs to Nautilus'
- 'Obolella desiderata belongs to Obolella'
- 'Olenus vermontana is recombined as Olenellus vermontana'
- 'Ophileta bella belongs to Ophileta'
- 'Ophileta compacta belongs to Ophileta'
- 'Ophileta disjuncta belongs to Ophileta'
- 'Ophileta nerine belongs to Ophileta'
- 'Orthis gemmicula belongs to Orthis'
- 'Orthis iphigenia belongs to Orthis'
- 'Orthoceras missisquoi belongs to Orthoceras'
- 'Paraharpes ottawaensis is recombined as Harpes ottawaensis'
- 'Petraster bellulus belongs to Petraster'
- 'Pleurorhynchus antiquus is recombined as Conocardium antiquum'
- 'Pleurotomaria agarista belongs to Pleurotomaria'
- 'Pleurotomaria agave belongs to Pleurotomaria'
- 'Pleurotomaria amphitrite belongs to Pleurotomaria'
- 'Pleurotomaria arabella belongs to Pleurotomaria'
- 'Pleurotomaria arachne belongs to Pleurotomaria'
- 'Pleurotomaria calphurnia belongs to Pleurotomaria'
- 'Pleurotomaria canadensis belongs to Pleurotomaria'
- 'Pleurotomaria deiopei belongs to Pleurotomaria'
- 'Pleurotomaria dryope belongs to Pleurotomaria'
- 'Pleurotomaria elora belongs to Pleurotomaria'
- 'Pleurotomaria etna belongs to Pleurotomaria'
- 'Pleurotomaria eugenia belongs to Pleurotomaria'
- 'Pleurotomaria galtensis belongs to Pleurotomaria'
- 'Pleurotomaria harpya belongs to Pleurotomaria'
- 'Pleurotomaria hortensia belongs to Pleurotomaria'
- 'Pleurotomaria hyale belongs to Pleurotomaria'
- 'Pleurotomaria normani belongs to Pleurotomaria'
- 'Pleurotomaria numeria belongs to Pleurotomaria'
- 'Pleurotomaria postumia belongs to Pleurotomaria'
- 'Pleurotomaria selecta belongs to Pleurotomaria'
- 'Pleurotomaria sponsa belongs to Pleurotomaria'
- 'Pleurotomaria vagrans belongs to Pleurotomaria'
- 'Pleurotomaria valeria belongs to Pleurotomaria'
- 'Pleurotomaria viola belongs to Pleurotomaria'
- 'Pleurotomaria virgo belongs to Pleurotomaria'
- 'Pleurotomaria virguncula belongs to Pleurotomaria'
- 'Pleurotomaria vitruvia belongs to Pleurotomaria'
- 'Remopleurides canadensis belongs to Remopleurides'
- 'Ribeiria calcifera belongs to Ribeiria'
- 'Ribeiria longiscula is recombined as Ribeirina longiscula'
- 'Salterella pulchella belongs to Salterella'
- 'Stenaster huxleyi belongs to Stenaster'
- 'Straparollina pelagica belongs to Straparollina'
- 'Straparollus asperostriatus is recombined as Straparollina asperostriatus'
- 'Straparollus circe belongs to Straparollus'
- 'Straparollus daphne belongs to Straparollus'
- 'Straparollus eurydice is recombined as Straparollina eurydice'
- 'Straparollus hippolyta belongs to Straparollus'
- 'Straparollus quebecensis belongs to Straparollus'
- 'Subulites daphne belongs to Subulites'
- 'Subulites parvulus belongs to Subulites'
- 'Subulites psyche belongs to Subulites'
- 'Trematis huronensis belongs to Trematis'