By Du Chaillu, Paul Belloni, 1831-1903 / Owen, Richard, 1804-1892 . Genre fw----- / Africa, West / Description and travel / Natural history / Africa, West and 8 more . Names sea / called / xx / gorilla / samba and 1343 more

By Bussigny, H. L. de (Henry L. de) . Genre Horses / Horsemanship . Names horse / order / animal / class / life and 222 more

By Gray, Asa, 1810-1888 / Darwin, Charles, 1809-1882 . Genre Evolution / Natural selection . Names plants / animals / life / animal / idea and 1933 more

By Sargent, Charles Sprague, 1841-1927 . Genre Wood / Trees / United States . Names wood / sap / trunk / soil / california and 4683 more

By Hollingworth, Harry L. (Harry Levi), 1880-1956 / Hollingworth, Leta Stetter, 1886-1939 . Genre Psychophysiology / Psychology, Applied . Names life / type / data / age / order and 697 more

By Henslow, George, 1835-1925 . Genre Flowers / Morphology / Fertilization of plants / Flowers / Evolution and 1 more . Names flowers / flower / plants / pollen / corolla and 4251 more

By Chapman, Frank M. (Frank Michler), 1864-1945 . Genre n-us--- / Birds / United States . Names life / wood / america / american / spotted and 1358 more

By Darwin, Charles, 1809-1882 . Genre Fertilization of plants / Orchids . Names pollen / flower / flowers / stigma / insects and 3560 more

By O'Donoghue, Charles Henry, 1885- . Genre Zoology . Names rana / animal / animals / lepus / life and 7371 more

By Haeckel, Ernst Heinrich Philipp August, 1834-1919 . Genre Evolution / Embryology, Human / Anatomy, Comparative / Human beings / Origin and 2 more . Names animals / vertebrates / simple / animal / called and 3250 more