Chaillu, Paul Belloni du
Grant, James August
Rohlfs, Gerhard Friedrich
Klunzinger, Carl Benjamin
Gürich, Georg
Dinter, Karl
Hartung, Georg
Meyer, Hans Heinrich Josef
Richardson, James
E. Poglayen
Johnston, Harry Hamilton
Heuglin, Martin Theodor von
Pick, Emil Gerhard
Russegger, Joseph