Nouvelles archives du Muséum d'histoire naturelle - Muséum national d'histoire naturelle (France) (Masson et Cie, 1880)

Nouvelles archives du Muséum d'histoire naturelle - Muséum national d'histoire naturelle (France) (Masson et Cie, 1881)

Nouvelles archives du Muséum d'histoire naturelle - Muséum national d'histoire naturelle (France) (Masson et Cie, 1893)

Nouvelles suites à Buffon (Roret, 1865)

Nouvelles suites à Buffon (Roret, 1870)

Nova acta Regiae Societatis Scientiarum Upsaliensis - Kungl. Vetenskaps-societeten i Uppsala. (Almqvist & Wiksells, 1869)

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

Novapex : trimestriel de la Société belge de malacologie - Société belge de malacologie. (La Société, 2017)

Novorum actorum Academiae Caesareae Leopoldino-Carolinae Germanicae Naturae Curiosorum - Kaiserlich Leopoldinisch-Carolinische Deutsche Akademie der Naturforscher (Friedrich Frommann, 1863)

The nucleic acids: chemistry and biology - Chargaff, Erwin. (Academic Press, 1955)

Nyt magazin for naturvidenskaberne - Physiographiske forening i Christiania. (Johan Dahl, 1914)

Obras completas y correspondencia científica - Ameghino, Florentino, 1853 -1911 (Taller de Impresiones Oficiales, 1921)

Observations on fish scales - Cockerell, Theodore D. A. (Theodore Dru Alison), 1866 -1948 (Govt. print. off, 1913)

Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 1969)

Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 1975)

Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 1890)

Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 1979)

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

Occasional papers of the California Academy of Sciences - California Academy of Sciences (California Academy of Sciences, 2012)

Occasional papers of the Museum of Natural History, the University of Kansas - University of Kansas. Museum of Natural History. (The University, 1977)

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

Occasional papers of the Museum of Natural History, the University of Kansas - University of Kansas. Museum of Natural History. (The University, 1982)

Occasional papers of the Museum of Natural History, the University of Kansas - University of Kansas. Museum of Natural History. (The University, 1992)

Occasional papers of the Museum of Natural History, the University of Kansas - University of Kansas. Museum of Natural History. (The University, 1994)

Occasional papers of the Natural History Museum, the University of Kansas, Lawrence, Kansas - University of Kansas. Museum of Natural History. (The University, 1994)

Occasional papers of the Natural History Museum, the University of Kansas, Lawrence, Kansas - University of Kansas. Museum of Natural History. (The University, 1995)

Occasional papers of the Natural History Museum, the University of Kansas, Lawrence, Kansas - University of Kansas. Museum of Natural History. (The University, 1996)

Occasional papers - Tulane University. Museum of Natural History. (The Museum, 1994)

Oceanus - Woods Hole Oceanographic Institution. (Woods Hole Oceanographic Institution, 1979)

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)

Old bones : or, Notes for young naturalists - Brooks, Vincent, 1815? -1885 (Robert Hardwicke, 1861)

On British wild flowers considered in relation to insects - Lubbock, John, Sir, 1834 -1913 (Macmillan, 1909)

On certain problems of vertebrate embryology - Royal College of Physicians of Edinburgh. (G. Fischer, 1896)

On Müller's and Cuvier's concepts of pharyngognath and labyrinth fishes and the classification of percomorph fishes : with an atlas of percomorph dorsal gill arches - Patterson, Colin (American Museum of Natural History, 1990)

On the anatomy of vertebrates - Owen, Richard, 1804 -1892 (Longmans, Green, 1866)

On the anatomy of vertebrates ... - Owen, Richard, 1804 -1892 (Longmans, Green and Co, 1866)

On the biology of our flat-fishes and on the decrease of our flat-fish fisheries, with some observations showing how to remedy the latter and promote the flat-fish fisheries in our seas east of the Skaw - Petersen, C. G. Joh. (Carl Georg Johannes), 1860 -1928 (Centraltrykkeriet, 1894)

On the development and life-histories of the Teleostean food and other fishes - M'Intosh, William Carmichael, 1838 -1931 (R. Grant & Son, 1890)

On the frequent occurrence of vegetable parasites in the hard structures of animals - Kölliker, Albert, 1817 -1905 ([s.n.], 1859)

On the morphology of the duck and the auk tribes - Parker, William Kitchen William Kitchen Parker 1823 -1890 (s.n.], 1890)

On the relationships of phallostethid fishes (Atherinomorpha) : with notes on the anatomy of Phallostethus dunckeri Regan, 1913 - Parenti, Lynne R (American Museum of Natural History, 1984)

On the structure and development of the skull in the Batrachia - Royal Society (Great Britain) (Royal Society, 1881)

On the structure and development of the skull in the mammalia - Parker, William Kitchen William Kitchen Parker 1823 -1890 (Royal Society of London, 1874)

On the structure and development of the skull of the common frog (Rana temporaria, L.) - Parker, William Kitchen William Kitchen Parker 1823 -1890 (Royal Society, 1871)

On the structure and development of the vertebral column of Amia - Hay, Oliver Perry, 1846 -1930 (1895)

On the structures and distribution of the genera of the arciferous Anura - Cope, E. D. (Edward Drinker), 1840 -1897 (s.n, 1866)

Ontogeny and systematics of fishes : based on an international symposium dedicated to the memory of Elbert Halvor Ahlstrom - United States. National Marine Fisheries Service. (American Society of Ichthyologists and Herpetologists, 1984)

Ontogeny of the ethmoidal region and hyopalatine arch in Macrognathus pancalus (Percomorpha, Mastacembeloidei) : with critical remarks on mastacembeloid inter- and intrarelationships - Britz, Ralf, 1964 - (American Museum of Natural History, 1996)

De ontwikkeling van het chondrocranium van Alytes obstetricans voor de metamorphose - Seters, Wouter Hendrik van. ("Het Klaverblad", 1921)

Opuscula zoologica - Zoologische Staatssammlung München. (Zoologische Staatssammlung, 1964)

The origin of the fittest : essays on evolution - Cope, E. D. (Edward Drinker), 1840 -1897 (D. Appleton, 1887)

The origin of the fittest : essays on evolution - Cope, E. D. (Edward Drinker), 1840 -1897 (Macmillan and Company, 1887)

The origin of the fittest; essays on evolution - Cope, E. D. (Edward Drinker), 1840 -1897 (D. Appleton, 1887)

Origin of the Weberian apparatus and the relationships of the ostariophysan and gonorynchiform fishes - Anderson, Sydney, 1927 -2018 (American Museum of Natural History, 1970)

The origin of vertebrates - Gaskell, Walter Holbrook, 1847 -1914 (Longmans, Green, 1908)

The origin of vertebrates - Gaskell, Walter Holbrook, 1847 -1914 (Longmans, Green, and co, 1908)

Osteology, phylogeny, and higher classification of the fishes of the order Plectognathi (Tetraodontiformes) - United States. National Marine Fisheries Service. (U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, 1980)

Otolith atlas of southern African marine fishes - Hecht, T. (Thomas) (J.L.B. Smith Institute of Ichthyology, 1995)