Abstract The Irving B. McNulty papers (1950s-1990s) consist of his curriculum vitae, copies of two talks he presented in the 1970s, a memorial tribute to Walter P. Cottam, and reprints of some of his publications and some he authored with others. McNulty was a Professor Emeritus of biology at the University of Utah. Included in the collection is correspondence written by McNulty to Louise Garrigues while he was working and traveling internationally.