Joannes Charles Melchior Chatin
- Category : 1847-births
- Type : MGE
- Profile : 2/4 - Hermit / Opportunist
- Definition : Triple Split
- Incarnation Cross : RAX Contagion 3
French botanist and zoologist who followed in the footsteps of his father, the doctor and botanist Gaspard Adolphe Chatin (1813-1901). During the Franco-Prussian War of 1870, Joannès was an aide-major in the French army. He gained the title doctor of medicine in 1871 and doctor of natural sciences in 1872. In the same year he became professeur agrégé at the École supérieure of pharmacy directed by his father. Then he was a demonstrator at École pratique des hautes études and a lecturer to the Faculty of Science of the University of Paris. On 4 January 1887, he was made assistant professor at that university, then in 1899, full professor.
He was a member of l’Académie Nationale de Médecine (25 May 1886) and l’Académie des sciences (1900). Also he was an officer of the Légion d'honneur.
He died in Les Essarts-le-Roi, Seine-et-Oise, on 4 July 1912, aged 65.