S. Stillman Berry (1887-1984), was a private researcher working in both malacology and horticulture. He received the B.A. in biology from Stanford University in 1909, the M.A. from Harvard University in 1910, and the Ph.D. from Stanford in 1913. While at Harvard he began his research in cephalopods; he continued work on that subject at Stanford under Harold Heath, where he wrote his dissertation on cephalopods of western North America.
After receiving the Ph.D., Berry accepted a position at the Scripps Institution of Biological Research as Librarian, where he developed the Institution's library collection. This was to be his only paid professional position in the sciences, and he remained at Scripps until 1919.
Following his father's death in 1917, Berry became corporate president of his family's ranch in Montana, but remained in Redlands, California, to continue his career as an independent researcher. He privately published a journal, Leaflets in Malacology. In that publication, as well as several others, he described 401 new taxa of mollusks, mostly from California and the eastern Pacific. In addition to his primary research interests in cephalopods, chitons, and land snails, Berry was an avid horticulturist. He maintained an orange grove and is credited with developing many new varieties of daffodils and irises. A lifelong collector, he amassed a highly significant shell collection, as well as a personal library of important and rare scientific works.
Berry's professional affiliations and honors included appointment as Honorary Member in the Cephalopod International Advisory Council, Life President of the American Malacological Union, and Research Associate at the Smithsonian Institution.