This book describes the life and work of Dr. Johannes Govertus de Man (1850-1930), a remarkable Dutch invertebrate zoologist. J.G. de Man worked on the systematics of both the Crustacea, in particular on Decapoda (i.e. crabs, crayfish, lobsters and shrimps), and the microscopically Nematoda or roundworms. The biographic part describes his years of childhood and youth, student days and the time he was working at the National Museum of Natural History, Leiden, the Netherlands and the period after he resigned at the museum. Within appendices his publications, described Crustacea, Nematoda and other taxa, species named after de Man and the de Man archive is presented. A selection of his drawings and a CD-ROM with his 1884 Nematoda monography is included.
Gerrit Karssen, is Nematode Taxonomist at the Dutch Plant Protection Service, Guest Professor at Gent Universty and Nematoda curator at Wageningen University. He has published particularly on plant-parasitic nematodes, including The plant-parasitic nematode genus Meloidogyne Gold, 1892 (Tylenchida) in Europe (Brill, 2002).