Authors: Ro
- Shackleton, Robert 1860-1923
- Shaler, Robert -
- Sharpe, Reginald R. (Reginald Robinson) 1848-1925
- Sharp, R. Farquharson (Robert Farquharson) 1864-1945
- Sharp, Robert 1851-1932
- Shaw, Robert B. -
- Shea, Robert 1933-1994
- Sheckley, Robert 1928-2005
- Shepherd, William R. (William Robert) 1871-1934
- Sherard, Robert Harborough 1861-1943
- Sherwood, Rosina Emmet 1854-1948
- Shewell, Livingston Robert 1833-1904
- Shirley, Ralph 1865-1946
- Shoppell, R. W. (Robert W.) -
- Shores, Robert J. (Robert James) 1881-1934
- Shrader, E. Roscoe (Edwin Roscoe) 1879-1960
- Shufeldt, Robert Wilson 1822-1895
- Shufeldt, Robert W. (Robert Wilson) 1850-1934
- Sibbald, James Romanes -
- Silverberg, Robert 1935-
- Simpson, Georgiana Rose 1865-1944
- Sim, Robert J. -
- Sims, George R. (George Robert) 1847-1922
- Sindall, R. W. (Robert Walter) -
- Skartvedt, Romayne 1916-1990
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