Rambles in search of shells, land, and freshwater - Harting, James Edmund, 1841 -1928 (John Van Voorst, 1875)

Random notes on natural history (Southwick & Jencks, 1886)

Die Raublungenschnecken (Agnatha). erste Abtheilung, Rhytidae & Enneidae - Kobelt, Wilhelm, 1840 -1916 (Verlag von Bauer & Raspe (Emil Küster), 1905)

Le règne animal distribué d'après son organisation, pour servir de base à l'histoire naturelle des animaux et d'introduction à l'anatomie comparée - Cuvier, Georges, baron, 1769 -1832 (Chez Déterville, 1830)

Reading Naturalist. Reading - Reading Natural History Society. (1952)

Real Sociedad Española de Historia Natural. Tomo extraordinario publicado con motivo del 50. aniversario de su fundación, 1921 - Sociedad Española de Historia Natural. (Museo Nacional de Ciencias Naturales, 1921)

Recente und im Löss gefundene Landschnecken aus China - Kaiserl. Akademie der Wissenschaften in Wien. Mathematisch-Naturwissenschaftliche Klasse. (Kaiserl. Akademie der Wissenschaften, 1883)

Recherches anatomiques et histologiques sur le Cyclostoma elegans - Garnault, Paul. (s.n, 1887)

Recherches sur le polymorphisme des mollusques de France - Coutagne, Georges. (Impr. Alexandre Rey, 1895)

Recherches sur les mollusques d'Abyssinie : matériaux de la collection Maurice de Rothschild - Anthony, R. (Raoul) 1874 -1941 (s.n.], 1908)

Recherches sur les végétaux fossiles de Meximieux - Marion, A.-F.‏ ‎ (Antoine Fortuné),‏ ‎ 1846 -1900 ([publisher not identified], 1872)

Record of Proceedings / Cleveland Naturalists' Field Club - Cleveland Naturalists' Field Club. (1899)

The Record of zoological literature (J. van Voorst, 1864)

The Record of zoological literature (J. van Voorst, 1865)

The Record of zoological literature (J. van Voorst, 1866)

The Record of zoological literature (J. van Voorst, 1867)

The Record of zoological literature (J. van Voorst, 1868)

The Record of zoological literature (J. van Voorst, 1869)

Records of the geological survey of India (1872)

Records of the Indian Museum - Indian Museum. (Pub. by order of the trustees of the Indian Museum, 1912)

Records of the Indian Museum - Indian Museum. (Pub. by order of the trustees of the Indian Museum, 1920)

Recueil de coquilles décrites par Lamarck dans son Histoire naturelle des animaux sans vertèbres et non encore figurées - Delessert, Benjamin, baron, 1773 -1847 (chez Fortin, Masson et Cie, 1841)

Regenerations-Erscheinungen bei den Schnecken / von Justus Carrière - Carrière, Justus, 1854 -1893 (Thein, 1880)

Le règne animal distribué d'après son organisation : pour servir de base a l'histoire naturelle des animaux et d'introduction a l'anatomie comparée - Cuvier, Georges, baron, 1769 -1832 (Chez Déterville, 1817)

Le règne animal distribué d'après son organisation, pour servir de base à l'histoire naturelle des animaux et d'introduction à l'anatomie comparée - Cuvier, Georges, baron, 1769 -1832 (Louis Hauman et Comp, 1836)

Reise der oesterreichischen Fregatte Novara um die Erde : in den Jahren 1857, 1858, 1859, unter den Befehlen des Commodore B. von Wüllerstorf-Urbair - Scherzer, Karl, Ritter von, 1821 -1903 (C. Gerold's Sohn, 1864)

Reise in den äussersten Norden und Osten Sibiriens während der Jahre 1843 und 1844 mit Allerhöchster Genehmigung auf Veranstaltung der Kaiserlichen Akademie der Wissenschaften zu St. Petersburg ausgeführt und in Verbindung mit vielen Gelehrten - Imperatorskai︠a︡ akademīi︠a︡ nauk (Russia) (Buchdr. der K. Akademie der Wissenschaften : Zu haben bei Eggers, 1851)

Reisen in der regentschaft Algier in den jahren 1836, 1837 und 1838 - Wagner, Moritz, 1813 -1887 (Leopold Voss, 1841)

Reisen und Forschungen im Amur-Lande in den Jahren 1854-1856 - Schrenck, Leopold von, 1826 -1894 (Commissionäre der K. Akademie der Wissenschaften, 1859)

Rendiconti - Accademia nazionale dei Lincei. Classe di scienze fisiche, matematiche e naturali. (1892)

Rendiconti - Reale Accademia dei Lincei (l'Accademia, 1890)

Rendiconti - Accademia nazionale dei Lincei. Classe di scienze fisiche, matematiche e naturali. (1911)

Repertorio fisico-natural de la isla de Cuba - Poey, Felipe, 1799 -1891 (Impr. del gobierno y capitanía general por S.M. [etc, 1865)

Repertorio Italiano per la Storia Naturale - Bianconi, Gio. Giuseppe (Giovanni Giuseppe), 1809 -1878 (1854)

Report and transactions - Guernsey Society of Natural Science; Local Research. (The Society, 1890-1922, 1895)

Report / Haileybury Natural Science Society - Haileybury Natural Science Society. (1873)

Report / Leeds Naturalists' Club & Scientific Association - Leeds Naturalists' Club; Scientific Association. (1876)

Report of the British Association for the Advancement of Science - British Association for the Advancement of Science. (1839)

Report of the British Association for the Advancement of Science - British Association for the Advancement of Science. (1850)

Report of the British Association for the Advancement of Science - British Association for the Advancement of Science. (1865)

Report of the British Association for the Advancement of Science - British Association for the Advancement of Science. (1867)

Report of the British Association for the Advancement of Science - British Association for the Advancement of Science. (1900)

Report of the British Association for the Advancement of Science - British Association for the Advancement of Science. (1903)

Report of the British Association for the Advancement of Science - British Association for the Advancement of Science. (1904)

Report of the Chester Society of Natural Science, Literature and Art - Chester Society of Natural Science Literature; Art. (1886)

Report of the Director to the Board of Trustees for the year ... - Chicago Natural History Museum. (The Museum, 1953)

Report of the Director to the Board of Trustees for the year ... - Chicago Natural History Museum. (The Museum, 1944)

Report of the East Kent Natural History Society - East Kent Natural History Society. (1859)

Report of the (Free) Public Library, Museum (Liverpool) - Liverpool (England). Free Public Library. Museum (1897)

Report of the Harrow School Scientific Society - Harrow School Scientific Society. (1866)

Report of the United States Geological Survey of the territories - Lesquereux, Léo, 1806 -1889 (Govt. Print. Off, 1873)

Report on the progress and condition of the U.S. National Museum for the year ending June 30 ... - United States National Museum (G.P.O, 1910)

Report on the scientific results of the voyage of H.M.S. Challenger during the years 1873-76 under the command of Captain George S. Nares ... and the late Captain Frank Tourle Thomson, R.N - Thomson, C. Wyville, Sir, (Charles Wyville), 1830 -1882 (Neill, 1886)

Report / Warwickshire Natural History & Archaeological Society - Warwickshire Natural History; Archaeological Society. (1873)

Reports on the food of the rook, starling and chaffinch. Part 1, 2 - Theobald, Fred. V. (Frederick Vincent), 1868 -1930 (1916)

Reports on the progress of zoology and botany, 1841, 1842 - Link, Heinrich Friedrich, 1767 -1851 (Printed for the Ray Society, 1845)

Reports on zoology for 1843, 1844 - Ray Society. (Printed for the Ray society, 1847)

Resultate der Wissenschaftlichen Erforschung des Balatonsees - Hungary. Földmm̋uvelésügyi Minisztérium. (E. Hölzel, 1897)