Svensk zoologi - Swartz, Olof, 1760 -1818 (Tryckt hos Carl Delén, 1806)

Svenska foglarna - Åkerlund, Peter, 1835 -1871 (Tryckt hos J. & A. Riis, 1883)

Svenska foglarna - Åkerlund, Peter, 1835 -1871 (Tryckt hos J. & A. Riis, 1885)

Sveriges och Norges fiskar - Lilljeborg, Wilhelm, 1816 -1908 (W. Schultz, 1881)

Sveriges och Norges fiskar - Lilljeborg, Wilhelm, 1816 -1908 (W. Schultz, 1891)

Sylloge algarum omnium hucusque cognitarum - Boston Society of Natural History. (Sumptibus auctoris, 1889)

Sylloge algarum omnium hucusque cognitarum - Boston Society of Natural History. (Sumptibus auctoris, 1891)

Sylloge fungorum omnium hucusque cognitorum - Saccardo, P. A. (Pier Andrea), 1845 -1920 (sumptibus auctoris, 1912)

Synonymia piscium Graeca et Latina emendata, aucta atque illustrata : Sive Historia piscium naturalis et literaria ab Aristotelis usque aevo ad seculum XIII deducta duce Synonymia piscium Petri Artedi - Schneider, Johann Gottlob, 1750 -1822 (Weidmannianae, 1789)

Synopsis des Diatomées de Belgique - Heurck, Henri Ferdinand van, 1838 -1909 (1885)

A synopsis of natural history: embracing the natural history of animals, with human and general animal physiology, botany, vegetable physiology and geology - Wyatt, Thomas, A. M. (T. Wardle, 1839)

A synopsis of the British Diatomaceæ : with remarks on their structure, functions and distribution; and instructions for collecting and preserving specimens - West, Tuffen (Printed for Smith and Beck, Pub. by J. Van Voorst, 1853)

A synopsis of the British Diatomaceæ : with remarks on their structure, functions and distribution; and instructions for collecting and preserving specimens - West, Tuffen (Printed for Smith and Beck, Pub. by J. Van Voorst, 1856)

Synopsis of the classification of the animal kingdom - Nicholson, Henry Alleyne, 1844 -1899 (W. Blackwood, 1882)

Synopsis of the contents of the British Museum - British Museum (Printed by G. Woodfall, 1838)

Synopsis of the contents of the British Museum - British Museum (Woodfall, 1842)

Synopsis of the contents of the British Museum - British Museum (Printed by G. Woodfall and Son, Angel Court, Skinner Street, 1840)

Synopsis of the contents of the British Museum - British Museum (Woodfall, 1841)

A synopsis of the fishes of North America - Storer, David Humphreys, 1804 -1891 (Metcalf, 1846)

Synopsis of the fishes of North America - Jordan, David Starr, 1851 -1931 (Govt. print. off, 1882)

Synopsis of the fishes of North America - Jordan, David Starr, 1851 -1931 (G.P.O, 1882)

Synopsis of the naviculoid diatoms. Presented to the R. Swedish Academy of Sciences May 10, 1893 - Cleve, P. T. (Per Teodor), 1840 -1905 (Norstedt, 1894)

Synopsis piscium Cubensium - Poey, Felipe, 1799 -1891 ([s.n, 1863)

A synoptic list of the fishes known to occur within fifty miles of Chicago - Hildebrand, Samuel F. 1883 -1949 (1910)

A System of natural history : containing scientifci [sic] and popular descriptions of man, quadrupeds, birds, fishes, reptiles and insects - Cuvier, Georges, baron, 1769 -1832 (Carter, Hendee, & Co, 1834)

System of ophthalmology - Duke-Elder, Stewart, Sir, 1898 -1978 (Mosby, 1958)

Systema helminthum / auctore Carolo Mauritio Diesing ... Sumptibus Academiae caesareae scientiarum - Diesing, Karl Moritz, 1800 -1867 (W. Braumüller, 1851)

Systema naturae per regna tria naturae : secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis - Linné, Carl von, 1707 -1778 (Typis Ioannis Thomae, 1767)

Systema naturae, per regna tria naturae : secundum classes, ordines, genera, species cum characteribus, differentiis, synonymis, locis - Linné, Carl von, 1707 -1778 (Typis Ioannis Thomae, 1767)

Systema naturae, per regna tria naturae : secundum classes, ordines, genera, species cum characteribus, differentiis, synonymis, locis - Linné, Carl von, 1707 -1778 (Typis Ioannis Thomae, 1770)

Systema naturae per regna tria naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis - Linné, Carl von, 1707 -1778 (Typis Ioannis Thomae von Trattner, 1767)

Systema natvræ per regna tria natvræ : secvndum classes, ordines, genera, species, cvm characteribus, differentiis, synonymis, locis - Gmelin, Johann Friedrich, 1748 -1804 (Typis Academicis, 1793)