Charles Schlumberger

Charles Schlumberger (29 September 1825, in Mulhouse – 12 July 1905, in Paris) was a French paleontologist, known for his studies of Foraminifera, both living and fossil species.
He received his education at the École Polytechnique, then spent his subsequent career with the naval corps of engineers. From 1849 he was based in Toulon, and six years later was assigned to work in Nancy. In 1881 he took early retirement from his job as an engineer and devoted his time to research at Muséum National d'Histoire Naturelle (MNHN) in Paris. In 1888 he was elected president of the Société géologique de France.
With geologist Ernest Munier-Chalmas, he conducted important research of dimorphism in Foraminifera, most notably, members of the Order Miliolida. He also performed studies on the evolutionary history of the extinct Foraminifera genera "Orbitoides", "Lepidocyclina" and "Miogypsina".
The Foraminifera species "Sigmoilopsis schlumbergeri" () and "Quinqueloculina schlumbergeri" () are named after him.