Nova acta Academiae Caesareae Leopoldino-Carolinae Germanicae Naturae Curiosorum - Kaiserlich Leopoldinisch-Carolinische Deutsche Akademie der Naturforscher (E. Blochmanni et Filii, 1908)

Nova acta physico-medica Academiae Caesareae Leopoldino-Carolinae Naturae Curiosum - Academia Caesarea Leopoldino-Carolina Naturae Curiosorum. (1820)

Nova acta Regiae Societatis Scientiarum Upsaliensis - Kungl. Vetenskaps-societeten i Uppsala. (Almqvist & Wiksells, 1773)

Nova acta Regiae Societatis Scientiarum Upsaliensis - Kungl. Vetenskaps-societeten i Uppsala. (Almqvist & Wiksells, 1856)

Nova Guinea : résultats de l'expédition scientifique néerlandaise à la Nouvelle-Guinée ... - Beaufort, L. F. de (Lieven Ferdinand), 1879 -1968 (E.J. Brill, 1911)

Nova Guinea : résultats de l'expédition scientifique néerlandaise à la Nouvelle-Guinée ... - Beaufort, L. F. de (Lieven Ferdinand), 1879 -1968 (E.J. Brill, 1917)

Novapex : trimestriel de la Société belge de malacologie - Société belge de malacologie. (La Société, 2010)

Novitates zoologicae : a journal of zoology in connection with the Tring Museum - British Museum (Natural History) (Zoological Museum, 1903)

Nuovo catalogo delle Conchiglie terrestri e fluviatili della Sicilia o continunzione alla Illustrazione sistèmatica, &c - Benoit, Luigi, 1804 -1890 (1881)

Nuytsia: journal of the Western Australian Herbarium - Western Australia. Department of Agriculture (Department of Biodiversity, Conservation and Attractions, 2015)

Nyt magazin for naturvidenskaberne - Physiographiske forening i Christiania. (Johan Dahl, 1900)

Nyt magazin for naturvidenskaberne - Physiographiske forening i Christiania. (Johan Dahl, 1907)

Nyt magazin for naturvidenskaberne - Physiographiske forening i Christiania. (Johan Dahl, 1910)

Nyt magazin for naturvidenskaberne - Physiographiske forening i Christiania. (Johan Dahl, 1922)

Obseruationes circa viuentia, quæ in rebus non viuentibus reperiuntur : Cum micrographia curiosa siue Rerum minutissimarum obseruationibus, quæ ope microscopij recognitæ ad viuum exprimuntur : his accesserunt aliquot animalium testaceorum icones non antea in lucem editæ : omnia curiosorum naturæ exploratorum vtilitati & iucunditati expressa & oblata - Buonanni, Filippo, 1638 -1725 (Typis Dominici Antonij Herculis, 1691)

Occasional paper - Entomological Society of British Columbia (The Society, 1994)

Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 1963)

Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 2001)

Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 2010)

Occasional papers of the Museum of Natural History, the University of Kansas - University of Kansas. Museum of Natural History. (The University, 1981)

Occurrence, chemical characteristics, and paleontology of the fossil resins from New Jersey - Grimaldi, David A. (American Museum of Natural History, 1989)

Official lists and indexes of names and works in zoology Supplement 1986-2000 - International Commission on Zoological Nomenclature (International Trust for Zoological Nomenclature, c/o Natural History Museum, 2001)

Öfversigt af Finska vetenskaps-societetens förhandlingar - Suomen Tiedeseura (s.n.], 1895)

Öfversigt af Finska vetenskaps-societetens förhandlingar - Suomen Tiedeseura (s.n.], 1900)

Öfversigt af Finska vetenskaps-societetens förhandlingar - Suomen Tiedeseura (s.n.], 1901)

Oikos= boletín del Centro de Ecología [UNAM] (Instituto de Ecología, UNAM, 2012)

On a new Brazilian spider of the genus Trachelopachys (Araneae, Corinnidae) : with notes on misplaced texa - Platnick, Norman I. (American Museum of Natural History, 1995)

On a third group of flattened ground spiders from Australia (Araneae, Lamponidae) - Platnick, Norman I. (American Museum of Natural History, 2004)

On Brucharachne, the spider that wasn't (Arachnida, Acari, Dermanyssoidea) - Platnick, Norman I. (American Museum of Natural History, 1995)

On Hesperocranum, a new spider genus from western North America (Araneae, Liocranidae) - Platnick, Norman I. (American Museum of Natural History, 1991)

On Melchisedec, a new genus of the spider family Oonopidae (Araneae, Dysderoidea) - Fannes, Wouter (American Museum of Natural History, 2010)

On Nyetnops, a new genus of the spider subfamily Nopinae (Araneae, Caponiidae) - Platnick, Norman I. (American Museum of Natural History, 2007)

On Puan, a new genus of goblin spiders from Argentina (Araneae, Dysderoidea, Oonopidae) - Goblin Spider Planetary Biodiversity Inventory. (American Museum of Natural History, 2012)

On Rastellus, a new genus of the spider family Ammoxenidae (Araneae, Gnaphosoidea) - Platnick, Norman I. (American Museum of Natural History, 1990)

On Teutoniella, an American genus of the spider family Micropholcommatidae (Araneae, Palpimanoidea) - Platnick, Norman I. (American Museum of Natural History, 1986)

On the Australasian ground spider genera Anzacia and Adelphodrassus (Araneae, Gnaphosidae) - Platnick, Norman I. (American Museum of Natural History, 1995)

On the Chilean spiders of the family Prodidomidae (Araneae, Gnaphosoidea), with a revision of the genus Moreno Mello-Leitão - Platnick, Norman I. (American Museum of Natural History, 2005)

On the first African spiders of the family Orsolobidae (Araneae, Dysderoidea) - Platnick, Norman I. (American Museum of Natural History, 1987)

On the first African spiders of the subfamily Molycriinae (Araneae, Prodidomidae) - Platnick, Norman I. (American Museum of Natural History, 2007)

On the first American spiders of the subfamily Sternodinae (Araneae, Malkaridae) - Platnick, Norman I. (American Museum of Natural History, 1987)

On the genera of the spider subfamily Otiothopinae (Araneae, Palpimanidae) - Platnick, Norman I. (American Museum of Natural History, 1999)

On the Micromygalinae, a new subfamily of mygalomorph spiders (Araneae, Microstigmatidae) - Platnick, Norman I. (American Museum of Natural History, 1982)

On the phylogenetic placement of the spider genus Atimiosa Simon, 1895, and the circumscription of Dolichognatha O.P.-Cambridge, 1869 (Tetragnathidae, Araneae) - Dimitrov, Dimitar. (American Museum of Natural History, 2010)

On the power, wisdom and goodness of God, as manifested in the creation of animals, and in their history, habits and instincts - Kirby, William, 1759 -1850 (Carey, Lea & Blanchard, 1836)

On the relationships of the spider genus Cybaeodes (Araneae, Dionycha) - Platnick, Norman I. (American Museum of Natural History, 1992)

On the spider genus Attacobius (Araneae, Dionycha) - Platnick, Norman I. (American Museum of Natural History, 1995)

On the synaphrid spider Cepheia longiseta (Simon 1881) (Araneae, Synaphridae) - Lopardo, Lara (American Museum of Natural History, 2007)

On the tibial and patellar glands, relationships, and American genera of the spider family Leptonetidae (Arachnida, Araneae) - Platnick, Norman I. (American Museum of Natural History, 1986)

On Unicorn, a new genus of the spider family Oonopidae (Araneae, Dysderoidea) - Platnick, Norman I. (American Museum of Natural History, 1995)

The Oölogist for the student of birds, their nests and eggs - Lattin, Frank H. (Frank H. Lattin, 1889)

Opalina : its anatomy and reproduction, with a decription of infection experiments and a chronological review of the literature - Metcalf, Maynard M. (Maynard Mayo), 1868 -1940 (G. Fischer, 1909)

Theophrasti Eresii De historia plantarum libri decem, Graece : cum syllabo generum et specierum, glossario, et notis - Theophrastus. (S. Collingwood, 1813)

The opilionid subfamily Ortholasmatinae (Opiliones, Troguloidea, Nemastomatidae) - Shear, William A. (American Museum of Natural History, 1983)

Opinions and declarations rendered by the International Commission on Zoological Nomenclature - International Commission on Zoological Nomenclature (Printed by order of the International Trust for Zoological Nomenclature, 1958)

Optimality, constraints, and hierarchies in the analysis of foraging strategies - Lucas, Jeffrey Robert, 1953 - (1983)