Johannes Govertus de Man, was a Dutch biologist. He was assistant curator at the Rijksmuseum van Natuurlijke Historie in Leiden, where he specialised in free-living nematodes and decapod crustaceans, although he also wrote papers on flatworms,... Wikipedia
Born: May 2, 1850, Middelburg, Netherlands
Died: January 19, 1930 (age 79 years), Middelburg, Netherlands