He provided the foundations for nematodetaxonomy and described over 1000 different nematode species. An individual with a variety of skills, he made signficiant contributions to a number of scientific dicsciplines and the USDA Nematology Lab, originally established with him as the director, continues today.
See also
Nathan Augustus Cobb: A Biography (http://www.barc.usda.gov/psi/nem/cobb.htm)
The Nathan A. Cobb Nematology Foundation (http://www.lal.ufl.edu/duncan/cobb_foundation.htm)
Society of Nematologists (http://www.nematologists.org/)