(1786–1836) France, also a naturalist Henri Filhol (1843–1902) France Harold John Finlay (1901–1951) New Zealand palaeontologist and conchologist Paul Henri Fischer (1835 – 1893) France John Fleming (1785–1857) Scotland Léopold de Folin (1817–1896) France Charles-François Fontannes (1839–1886) France Edward Forbes (1815–1845) Great Britain Lothar H.E.W. Forcart (1902–1990) Switzerland André Franc (1911–1990s) France G Charles John Gabriel (1879–1963) Australia Joseph Paul Gaimard (1796–1858) France Andrew Garrett (1823–1887) United States Louis Germain (1878–1942) France David Geyer (1855–1932) Germany Theodore Gill (1837–1914) United States Gonzalo Giribet (1970–) Spain. United States Johann Friedrich Gmelin (1748–1804) Germany Henry Haversham Godwin-Austen (1834–1923) Great Britain, British India Augustus Addison Gould (1805–1866) United States Stephen Jay Gould (1941–2002) United States, paleontologist who also studied land snails. Alastair Graham (1906–2000) Great Britain Jean-Pierre Sylvestre de Grateloup (1782–1862) France Edward Whitaker Gray (1748–1806) Great Britain Elizabeth Gray (1831–1924) Great Britain Francis Calley Gray (1790–1856) United States John Edward Gray (1800–1875) Great Britain Maria Emma Gray (1787–1876) Great Britain, wife of John Edward Gray Russell Gray (died 1948) United States Samuel Frederick Gray (1766–1828) Great Britain Georg Grimpe (1889–1936) Germany Karl Grobben (1854–1945) Austria Niccolò Gualtieri (1688–1744) Italy Gerard Pierre Laurent Kalshoven Gude (1858–1924) Great Britain John Thomas Gulick (1832–1923) Hawaii, developed evolution theories with Charles Darwin Robert John Lechmere Guppy (1836–1916) Trinidad. H Fritz Haas (1886–1969) Germany Georg Haas (1905–1981) Israel Samuel Stehman Haldeman (1812–1880) United States Sylvanus Charles Thorp Hanley (1819–1899) Great Britain Johan Conrad van Hasselt (1797–1823) vertebratologist, he also studied mollusks from Java Gerhard Haszprunar (1957–) Austria Bernhard Hausdorf, Germany William H. Heard (1935–) United States Charles Hedley (1862–1926) Great Britain, but mostly active in Australia Friedrich Held (1812–1872) Germany Joseph Heller (1941–) Israel Henry Hemphill (1830–1914) United States John Brooks Henderson Jr. (1870–1923) United States Junius Henderson (1865–1937) United States Leo George Hertlein (1898 – 1972) United States Pierre Marie Heude (1836 –1902) France Joaquín González Hidalgo y Rodríguez (1839–1923), Spain Richard Brinsley Hinds (1811–1846) Great Britain Shintarō Hirase (1884–1939) Japan Yoichirō Hirase (1859–1925) Japan, father of Shintarō Hirase Frederick George "Eric" Hochberg (1941–), United States Hans Hoffmann (1896-1947) Germany William Evans Hoyle (1855–1926) Great Britain Thomas George Bond Howes (1853–1905) Great Britain Leslie Hubricht (1908–2005) United States George Humphrey (1739–1826) Great Britain Christian Hee Hwass (1731–1803) Denmark I Tom Iredale (1880–1972) England Arturo Issel (1842–1922) Italy J John Clarkson Jay (1808–1891) American amateur conchologist. John Gwyn Jeffreys (1809–1885) Great Britain Charles Willison Johnson (1863–1932) American