Paul Henri Fischer (also spelled Paul-Henri Fischer), (7 July 1835 Paris – 29 November 1893) was a French physician, zoologist and paleontologist.
He studied science and medicine, securing doctorates in both, and became assistant in paleontology at the National Museum of Natural History in Paris.
Beginning in 1856, he was joint editor, with A. C. Bernardi to start with, of the Journal de Conchyliologie.
He served several terms as president of the Société Géologique de France and the Société Zoologique de France.
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