Alphonse Amédée Trémeau de Rochebrune (1836–1912) France Jean-Pierre Rocroi France Peter Friedrich Röding (1767–1846) Germany Landon Timmonds Ross, Jr. (1942–) United States Gary Rosenberg (born 1959) United States Emil Adolf Rossmässler (1806–1867) Germany Miriam Rothschild (1908–2005) United Kingdom Jean Louis Florent Polydore Roux (1792–1833) France William B. Rudman (1944–) New Zealand John Ruskin (1819–1900) United Kingdom Vasily Ermolaevich Ruzhentsev (1899–1978) Russia S Georg Ossian Sars (1837–1927) Norway, marine and freshwater biologist Carl Ulisses von Salis-Marschlins (1762–1818) Switzerland Madoka Sasaki (1883–1927) Japan Thomas Say (1787–1834) United States Christoffer Schander (1960–2012) Sweden, Director of University Museum of Bergen, Norway Mattheus Marinus Schepman (1847–1919) Netherlands Franz Xaver Alfred Johann Schilder (1896–1970) Germany Menno Schilthuizen (1965–) Netherlands Otto Heinrich Schindewolf (1896–1971) Germany, evolution of cephalopods Johann Samuel Schröter (1735–1808) Germany Gustav Schwartz (1809–1890) Austria Heinrich Christian Friedrich Schumacher (1757–1830) Denmark Revett Sheppard (1778–1830) Great Britain Bohumil Shimek (1861–1937) United States Robert James Shuttleworth (1810–1874) Great Britain, Switzerland Charles Torrey Simpson (1846–1932) United States Heinrich Simroth (1851–1917) Germany Claude Sionnest (1749–1820) France Arthur Donaldson Smith (1864–1939) Great Britain Charles Smith (topographer) (c. 1715–1762) Ireland Edgar Albert Smith (1847–1916) Great Britain, zoologist Eugene Allen Smith (1841–1927) United States, malacologist Herbert Huntingdon Smith (1851–1919) United States James Edward Smith (1759–1828) Great Britain Sidney Irving Smith (1843–1926) United States, brother-in-law of A. E. Verrill William Smith (1769–1839) Great Britain William Walter Smith (1852–1942) New Zealand Alan Solem, full name George Alan Solem (1931–1990) United States, curator of invertebrates in Field Museum of Natural History, Chicago Árpád Soós (1912–1991) Hungary, son of Lajos Soós Louis François Auguste Souleyet (1811–1852) France George Brettingham Sowerby I (1788–1854) Great Britain George Brettingham Sowerby II(1812–1884) Great Britain George Brettingham Sowerby III (1843–1921) Great Britain James Sowerby (1757–1822) Great Britain Gerard Spaink (1928–2005) Netherlands Leonard Frank Spath (1882–1957) Great Britain Lorenz Spengler (1720–1807) Denmark Yaroslav Igorevich Starobogatov (1932–2004) Russia Robert Edwards Carter Stearns (1827–1909) United States Edward Step (1855–1933) Great Britain Victor Sterki (1846–1933) Switzerland William Stimpson (1832–1872) United States Charles Stokes (1780s–1853) Great Britain Adolf Stossich (1824–1900 ) Italy Hermann Strebel (1834–1915) Germany, Mexico. Ellen E. Strong United States Samuel Emanuel Studer (1757–1834) Switzerland Rudolf Sturany (1867–1935) Austria, works Henry Suter (1841–1918) Switzerland, New Zealand William John Swainson (1789–1855) Great Britain Ernest Ruthven Sykes (1867–1954) Great Britain T Iwao Taki (1901–1984) Japan Cesare Maria Tapparone-Canefri (1838–1891) Italy Dwight Willard Taylor (1932–2006) United States, also paleontologist, Hydrobiidae and Physidae<ref>Alan R. Kabat, Richard I. Johnson